Publications

2026

Regularized micromagnetic theory for Bloch points. V.M. Kuchkin, A. Haller, A. Michels, T.L. Schmidt, and N.K. Kiselev, arXiv: 2508.19784.

Quantum skyrmions and antiskymions in monoaxial chiral magnets. Š. Liščák, A. Haller, A. Michels, T.L. Schmidt, and V.M. Kuchkin, arXiv:2503.16020

2025

Micromagnetic structure of oxidized magnetite nanoparticles: sharp structural versus diffuse magnetic interface. E.M. Jefremovas, M.P. Adams, L. Gandarias, L. Marcano, J. Alonso, A. Michels, and J. Leliaert, Nanoscale 17, 26203-26213 (2025). doi: 10.1039/D5NR02700D

Spin-disorder-induced angular anisotropy in polarized magnetic neutron scattering. I. Titov, M. Bersweiler, M.P. Adams, E.P. Sinaga, V. Rai, Š. Liščák, M. Lahr, T.L. Schmidt, V.M. Kuchkin, A. Haller, K. Suzuki, N.-J. Steinke, D. Alba Venero, D. Honecker, J. Kohlbrecher, L.F. Barquin, and A. Michels, Phys. Rev. Lett. 135, 196706 (2025). doi: 10.1103/5yc2-pv4y

Scaling in magnetic neutron scattering. V. Rai and A. Michels, Phys. Rev. B 112, 144403 (2025). doi: 10.1103/9qb1-r9bs

Evolution at the nanoscale of magnetic clustering of the Griffiths-like phase in Tb_4.925La_0.075Si₂Ge₂. N. Marcano, E.M. Jefremovas, I. Titov, A. Michels, N.-J. Steinke, J.H. Belo, J.P. Araújo, P.A. Algarabel, and L.F. Barquín, J. Alloys Comp. 1039, 182787 (2025). doi: 10.1016/j.jallcom.2025.182787

Stability and nucleation of dipole strings in uniaxial chiral magnets. V.M. Kuchkin, N.K. Kiselev, A. Haller, Š. Liščák, A. Michels, and T.L. Schmidt, Phys. Rev. B 111, 174410 (2025). doi: 10.1103/PhysRevB.111.174410

Quantum and classical magnetic Bloch points. V.M. Kuchkin, A. Haller, Š. Liščák, M.P. Adams, V. Rai, E.P. Sinaga, A. Michels, and T.L. Schmidt, Phys. Rev. Res. 7, 013195 (2025). doi: 10.1103/PhysRevResearch.7.013195

2024

Magnetic microstructure of nanocrystalline Fe-Nb-B alloys as seen by small-angle neutron and x-ray scattering. V. Rai, I. Titov, M.P. Adams, K. Suzuki, J. Kohlbrecher, and A. Michels, Phys. Rev. B 110, 054437 (2024). (Editors’ Suggestion) doi: 10.1103/PhysRevB.110.054437

Low-frequency signature of magnetization nutation in nanomagnets. M.P. Adams, R. Bastardis, A. Michels, and H. Kachkachi, Phys. Rev. B 110, 054415 (2024). doi: 10.1103/PhysRevB.110.054415

Neutron scattering signature of the Dzyaloshinskii-Moriya interaction in nanoparticles. E.P. Sinaga, M.P. Adams, E.H. Hasdeo, and A. Michels, Phys. Rev. B 110, 054404 (2024). doi: 10.1103/PhysRevB.110.054404

Framework for polarized magnetic neutron scattering from nanoparticle assemblies with vortex-type spin textures. M.P. Adams, E.P. Sinaga, Š. Liščák, and A. Michels, Phys. Rev. B 110, 014420 (2024). (Editors’ Suggestion) doi: 10.1103/PhysRevB.110.014420

Small-angle neutron scattering signatures of magnetic hopfions. K.L. Metlov and A. Michels, Phys. Rev. B 109, L220408 (2024). doi: 10.1103/PhysRevB.109.L220408

Unraveling grain growth of metallic tungsten: Investigating the nanoscale realm of hydrogen reduction of tungsten oxides. A.A. Estupinan-Donoso, P. Gravier, R.U. Ichikawa, and A. Michels, Powder Technology 438, 119672 (2024). doi: 10.1016/j.powtec.2024.119672

Signature of surface anisotropy in the spin-flip neutron scattering cross section of spherical nanoparticles: Atomistic simulations and analytical theory. M.P. Adams, E.P. Sinaga, H. Kachkachi, and A. Michels, Phys. Rev. B 109, 024429 (2024). doi: 10.1103/PhysRevB.109.024429

2023

Micromagnetics of ferromagnetic/antiferromagnetic nanocomposite materials. II. Mesoscopic modeling. S. Erokhin, D. Berkov, and A. Michels, Phys. Rev. B 108, 214426 (2023). doi: 10.1103/PhysRevB.108.214426

Micromagnetics of ferromagnetic/antiferromagnetic nanocomposite materials. I. Towards a mesoscopic approach. S. Erokhin, D. Berkov, and A. Michels, Phys. Rev. B 108, 214425 (2023). doi: 10.1103/PhysRevB.108.214425

Fingerprint of vortexlike flux closure in an isotropic Nd-Fe-B bulk magnet. M. Bersweiler, Y. Oba, E.P. Sinaga, I. Peral, I. Titov, M.P. Adams, V. Rai, K.L. Metlov, and A. Michels, Phys. Rev. B 108, 094434 (2023). doi: 10.1103/PhysRevB.108.094434

Spatial magnetization profile in spherical nanomagnets with surface anisotropy: Green’s function approach. M.P. Adams, A. Michels, and H. Kachkachi, Phys. Scr. 98, 105512 (2023). doi: 10.1088/1402-4896/acf5b0

Generic role of the Dzyaloshinskii-Moriya interaction in nanocrystalline ferromagnets. S. Erokhin, D. Berkov, and A. Michels, New J. Phys. 25, 083018 (2023). doi: 10.1088/1367-2630/acd65a

Effect of annealing on the magnetic microstructure of high-pressure torsion iron: the relevance of higher-order contributions to the magnetic small-angle neutron scattering cross section. M. Bersweiler, H. Sato, N. Adachi, Y. Todaka, I. Peral, J. Kohlbrecher, V.D. Zaporozhets, K.L. Metlov, A. Michels, and Y. Oba, IUCrJ 10, 411-419 (2023). doi: 10.1107/S2052252523003937

On the angular anisotropy of the randomly averaged magnetic neutron scattering cross section of nanoparticles. M.P. Adams, E.P Sinaga, and A. Michels, IUCrJ 10, 261-269 (2023). doi: 10.1107/S205225252300180X

Micromagnetic simulation of neutron scattering from spherical nanoparticles: Effect of pore-type defects. E.P. Sinaga, M.P. Adams, M. Bersweiler, L.G. Vivas, E.H. Hasdeo, J. Leliaert, P. Bender, D. Honecker, and A. Michels, Phys. Rev. B 107, 014416 (2023). doi: 10.1103/PhysRevB.107.014416

2022

Magnetic neutron scattering from spherical nanoparticles with Neel surface anisotropy: atomistic simulations. M.P. Adams, A. Michels, and H. Kachkachi, J. Appl. Cryst. 55, 1488-1499 (2022). doi: 10.1107/S1600576722008949

Magnetic neutron scattering from spherical nanoparticles with Neel surface anisotropy: analytical treatment. M.P. Adams, A. Michels, and H. Kachkachi, J. Appl. Cryst. 55, 1475-1487 (2022). doi: 10.1107/S1600576722008925

Quantum skyrmion lattices in Heisenberg ferromagnets. A. Haller, S. Groenendijk, A. Habibi, A. Michels, and T.L. Schmidt, Phys. Rev. Res. 4, 043113 (2022). doi: 10.1103/PhysRevResearch.4.043113

MuMag2022: A software tool for analyzing magnetic-field-dependent unpolarized small-angle neutron scattering data of bulk ferromagnets. M.P. Adams, M. Bersweiler, E.M. Jefremovas, and A. Michels, J. Appl. Cryst. 55, 1055-1062 (2022). doi: 10.1107/S1600576722005349

Magnetic nanoprecipitates and interfacial spin disorder in zero-field-annealed Ni₅₀Mn₄₅In₅ Heusler alloys as seen by magnetic small-angle neutron scattering. M. Bersweiler, P. Bender, I. Peral, E.P. Sinaga, D. Honecker, D. Alba Venero, I. Titov, and A. Michels, J. Appl. Cryst. 55, 713-721 (2022). doi: 10.1107/S1600576722006355

Magnetic order and disorder environments in superantiferromagnetic NdCu₂ nanoparticles. E.M. Jefremovas, P. Svedlindh, F. Damay, D. Alba Venero, A. Michels, J.A. Blanco, and L.F. Barquín, Sci. Rep. 12, 9733 (2022). doi: https://doi.org/10.1038/s41598-022-13817-7

Small-angle neutron scattering by spatially inhomogeneous ferromagnets with a nonzero average uniaxial anisotropy. V.D. Zaporozhets, Y. Oba, A. Michels, and K.L. Metlov, J. Appl. Cryst. 55, 592-600 (2022). doi: 10.1107/S160057672200437X

Uniaxial polarization analysis of bulk ferromagnets: theory and first experimental results. A. Malyeyev, I. Titov, C. Dewhurst, K. Suzuki, D. Honecker, and A. Michels, J. Appl. Cryst 55, 569-585 (2022). doi: 10.1107/S1600576722003508

Using small-angle scattering to guide functional magnetic nanoparticle design. D. Honecker, M. Bersweiler, S. Erokhin, D. Berkov, K. Chesnel, D. Alba Venero, A. Qdemat, S. Disch, J.K. Jochum, A. Michels, and P. Bender, Nanoscale Adv. 4, 1026-1059 (2022). doi: 10.1039/D1NA00482D

Unraveling the magnetic softness in Fe-Ni-B based nanocrystalline material by magnetic small-angle neutron scattering. M. Bersweiler, M.P. Adams, I. Peral, J. Kohlbrecher, K. Suzuki, and A. Michels, IUCrJ 9, 65-72 (2022). doi: 10.1107/S2052252521010605

2021

Observation of surface magnons and crystalline electric field shifts in superantiferromagnetic NdCu₂ nanoparticles. E.M. Jefremovas, M. de la Fuente Rodríguez, F. Damay, B. Fak, A. Michels, J.A. Blanco, and L.F. Barquín, Phys. Rev. B 104, 134404 (2021). doi: https://doi.org/10.1103/PhysRevB.104.134404

Chemical vapor deposition of CoFe₂O₄ micropillar arrays with enhanced magnetic properties. B. Aspe, A. Malyeyev, A. Vakilinejad, K. Menguelti, A. Michels, and N. Bahlawane, J. Alloys Comp. 890, 161758 (2021). doi: https://doi.org/10.1016/j.jallcom.2021.161758

Role of higher-order effects in spin-misalignment small-angle neutron scattering of high-pressure torsion nickel. Y. Oba. M. Bersweiler, I. Titov, N. Adachi, Y. Todaka, E.P. Gilbert, N.-J. Steinke, K.L. Metlov, and A. Michels, Phys. Rev. Mater. 5, 084410 (2021). doi: https://doi.org/10.1103/PhysRevMaterials.5.084410

Low-temperature growth of AlN films on magnetostrictive foils for high-magnetoelectric-response thin-film composites. T. Nguyen, Y. Fleming, P. Bender, P. Grysan, N. Valle, B. El Adib, N. Adjeroud, D. Arl, M. Emo, J. Ghanbaja, A. Michels, and J. Polesel Maris, ACS Appl. Mater. & Interfaces 13, 30874-30884 (2021). doi: 10.1021/acsami.1c08399

Magnetic Small-Angle Neutron Scattering: A Probe for Mesoscale Magnetism Analysis. A. Michels, Oxford University Press, Oxford, 2021. doi: 10.1093/oso/9780198855170.001.0001

Revealing defect-induced spin disorder in nanocrystalline Ni. M. Bersweiler, E.P. Sinaga, I. Peral, N. Adachi, P. Bender, N.-J. Steinke, E.P. Gilbert, Y. Todaka, A. Michels, and Y. Oba, Phys. Rev. Mater. 5, 044409 (2021). doi: 10.1103/PhysRevMaterials.5.044409

Neutron study of magnetic correlations in rare-earth-free Mn-Bi magnets. A. Malyeyev, I. Titov, P. Bender, M. Bersweiler, V. Pipich, S. Mühlbauer, S. Ener, O. Gutfleisch, and A. Michels, Phys. Rev. Mater. 5, 034407 (2021). doi: 10.1103/PhysRevMaterials.5.034407

Unraveling nanostructured spin textures in bulk magnets. P. Bender, J. Leliaert, M. Bersweiler, D. Honecker, and A. Michels, Small Sci. 1, 2000003 (2021). doi: 10.1002/smsc.202000003

2020

Toward understanding complex spin textures in nanoparticles by magnetic neutron scattering. L.G. Vivas, R. Yanes, D. Berkov, S. Erokhin, M. Bersweiler, D. Honecker, P. Bender, and A. Michels, Phys. Rev. Lett. 125, 117201 (2020). doi: 10.1103/PhysRevLett.125.117201

The benefits of a Bayesian analysis for the characterization of magnetic nanoparticles. M. Bersweiler, H. Gavilan Rubio, D. Honecker, A. Michels, and P. Bender, Nanotechnology 31, 435704 (2020). doi: https://doi.org/10.1088/1361-6528/aba57b

Anisometric mesoscale nuclear and magnetic texture in sintered Nd-Fe-B magnets. I. Titov, D. Honecker, D. Mettus, A. Feoktystov, J. Kohlbrecher, P. Strunz, and A. Michels, Phys. Rev. Mater. 4, 054419 (2020). doi: 10.1103/PhysRevMaterials.4.054419 (Editors’ Suggestion)

Experimental observation of third-order effect in magnetic small-angle neutron scattering. K.L. Metlov, K. Suzuki, D. Honecker, and A. Michels, Phys. Rev. B 101, 214410 (2020). doi: https://doi.org/10.1103/PhysRevB.101.214410

Magnetic correlations in polycrystalline Tb_0.15Co_0.85. M. Bersweiler, P. Bender, I. Peral, L. Eichenberger, M. Hehn, V. Polewczyk, S. Mühlbauer, and A. Michels, J. Phys. D: Appl. Phys. 53, 335302 (2020). doi: https://doi.org/10.1088/1361-648X/ab80f8

Defect-induced Dzyaloshinskii-Moriya interaction in a nanocrystalline two-phase alloy. Y. Quan, J. Kohlbrecher, P. Hautle, and A. Michels, J. Phys.: Condens. Matter 32, 285804 (2020). doi: https://doi.org/10.1088/1361-648X/ab80f8

Magnetic Guinier law. A. Michels, A. Malyeyev, I. Titov, D. Honecker, R. Cubitt, E. Blackburn, and K. Suzuki, IUCrJ 7, 136-142 (2020). doi: https://doi.org/10.1107/S2052252519016439

2019

Size-dependent spatial magnetization profile of manganese-zinc ferrite Mn_0.2Zn_0.2Fe_2.6O₄ nanoparticles. M. Bersweiler, P. Bender, L.G. Vivas, M. Albino, M. Petrecca, S. Mühlbauer, S. Erokhin, D. Berkov, C. Sangregorio, and A. Michels, Phys. Rev. B 100, 144434 (2019). doi: https://doi.org/10.1103/PhysRevB.100.144434

Effect of grain-boundary diffusion process on the geometry of the grain microstructure of Nd-Fe-B nanocrystalline magnets. I. Titov, M. Barbieri, P. Bender, I. Peral, J. Kohlbrecher, K. Saito, V. Pipich, M. Yano, and A. Michels, Phys. Rev. Mater. 3, 084410 (2019). doi: 10.1103/PhysRevMaterials.3.084410

Evidence for the formation of nanoprecipitates with magnetically disordered regions in bulk Ni₅₀Mn₄₅In₅ Heusler alloys. G. Benacchio, I. Titov, A. Malyeyev, I. Peral, M. Bersweiler, P. Bender, D. Mettus, D. Honecker, E.P. Gilbert, M. Coduri, A. Heinemann, S. Mühlbauer, A. Çakir, M. Acet, and A. Michels, Phys. Rev. B 99, 184422 (2019). doi: 10.1103/PhysRevB.99.184422

Erratum: Third-order effect in magnetic small-angle neutron scattering by a spatially inhomogeneous medium [Phys. Rev. B 91, 054404 (2015)]. K.L. Metlov and A. Michels, Phys. Rev. B 99, 099906(E) (2019). doi: 10.1103/PhysRevB.99.099906

Magnetic small-angle neutron scattering. S. Mühlbauer, D. Honecker, E.A. Périgo, F. Bergner, S. Disch, A. Heinemann, S. Erokhin, D. Berkov, C. Leighton, M.R. Eskildsen, and A. Michels, Rev. Mod. Phys. 91, 015004 (2019). doi: 10.1103/RevModPhys.91.015004

Microstructural-defect-induced Dzyaloshinskii-Moriya interaction. A. Michels, D. Mettus, I. Titov, A. Malyeyev, M. Bersweiler, P. Bender, I. Peral, R. Birringer, Y. Quan, P. Hautle, J. Kohlbrecher, D. Honecker, J. Rodríguez Fernández, L. Fernández Barquín, and K.L. Metlov, Phys. Rev. B 99, 014416 (2019). doi: 10.1103/PhysRevB.99.014416

Morphological and crystallographic orientation of hematite spindles in applied magnetic field. D. Zakutna, Y. Falke, D. Dresen, S. Prevost, P.F. Bender, D. Honecker, and S. Disch, Nanoscale 11, 7149-7156 (2019). doi: 10.1039/C8NR09583

2018

Effect of annealing conditions on the microstructure and magnetic properties of sintered Nd-Fe-B magnets as seen by magnetic SANS. É.A. Périgo, I. Titov, R. Weber, D. Mettus, I. Peral, O. Vallcorba, D. Honecker, A. Feoktystov, and A. Michels, Mater. Res. Express 5, 036110 (2018). doi: 10.1088/2053-1591/aab7aa

Towards understanding of magnetization reversal in Nd-Fe-B nanocomposites: analysis by high-throughput micromagnetic simulations. S. Erokhin, D. Berkov, M. Ito, A. Kato, M. Yano, and A. Michels, J. Phys.: Condens. Matter 30, 125802 (2018). doi: 10.1088/1361-648X/aaaf58

2017

Magnetic small-angle neutron scattering on bulk metallic glasses: A feasibility study for imaging displacement fields. D. Mettus, M. Deckarm, A. Leibner, R. Birringer, M. Stolpe, R. Busch, D. Honecker, J. Kohlbrecher, P. Hautle, N. Niketic, J. Rodríguez Fernández, L. Fernández Barquín, and A. Michels, Phys. Rev. Mater. 1, 074403 (2017). doi: 10.1103/PhysRevMaterials.1.074403

Small-angle neutron scattering modeling of spin disorder in nanoparticles. L.G. Vivas, R. Yanes, and A. Michels, Sci. Rep. 7, 13060 (2017). doi: 10.1038/s41598-017-13457-2

Surfactant-assisted production of TbCu₂ nanoparticles. M. de la Fuente Rodríguez, J.I. Espeso, J.A. González, J. Rodríguez Fernández, D.P. Rojas, L. Rodríguez Fernández, A. Garcia-Arribas, M.L. Fdez-Gubieda, C. Echevarria-Bonet, É.A. Périgo, A. Michels, and L. Fernández Barquín, J. Nanopart. Res. 19, 231 (2017). doi: 10.1007/s11051-017-3931-6

Spin structures of textured and isotropic Nd-Fe-B-based nanocomposites: Evidence for correlated crystallographic and spin texture. A. Michels, R. Weber, I. Titov, D. Mettus, É.A. Périgo, I. Peral, O. Vallcorba, J. Kohlbrecher, K. Suzuki, M. Ito, A. Kato, and M. Yano, Phys. Rev. Applied 7, 024009 (2017). doi: 10.1103/PhysRevApplied.7.024009

2016

Effect of Dzyaloshinski-Moriya interaction on elastic small-angle neutron scattering. A. Michels, D. Mettus, D. Honecker, and K.L. Metlov, Phys. Rev. B 94, 054424 (2016). (Editors’ Suggestion) doi: 10.1103/PhysRevB.94.054424

Phase separation in NiCrN coatings induced by N₂ addition in the gas phase: A way to generate magnetic thin films by reactive sputtering of a non-magnetic NiCr target. I. Luciu, D. Duday, P. Choquet, E.A. Périgo, A. Michels, and T. Wirtz, Appl. Surf. Sci. 389, 578-584 (2016). doi: 10.1016/j.apsusc.2016.07.126

Magnetic neutron scattering by magnetic vortices in thin submicron-sized soft ferromagnetic cylinders. K.L. Metlov and A. Michels, Sci. Rep. 6, 25055 (2016). doi: 10.1038/srep25055

Small-angle neutron scattering study of coercivity enhancement in grain-boundary-diffused Nd-Fe-B sintered magnets. E.A. Périgo, I. Titov, R. Weber, D. Honecker, E.P. Gilbert, M.F. De Campos, and A. Michels, J. Alloys Comp. 677, 139-142 (2016). doi: 10.1016/j.jallcom.2016.03.160

Magnetic field-dependent spin structures of nanocrystalline holmium. P. Szary, D. Kaiser, J.-P. Bick, D. Lott, A. Heinemann, C. Dewhurst, R. Birringer, and A. Michels, J. Appl. Cryst. 49, 533-538 (2016). doi: 10.1107/S1600576716001898

Magnetic microstructure of a textured Nd-Fe-B sintered magnet characterized by small-angle neutron scattering. E.A. Périgo, D. Mettus, E.P. Gilbert, P. Hautle, N. Niketic, B. van den Brandt, J. Kohlbrecher, P. McGuiness, Z. Fu, and A. Michels, J. Alloys Comp. 661, 110-114 (2016). doi: 10.1016/j.jallcom.2015.11.167

2015

Fundamentals and advances in magnetic hyperthermia. E.A. Périgo, G. Hemery, O. Sandre, D. Ortega, E. Garaio, F. Plazaola, and F.J. Teran, Appl. Phys. Rev. 2, 041302 (2015). doi: 10.1063/1.4935688

Excitation of Ni nanorod colloids in oscillating magnetic fields: a new approach for nanosensing investigated by TISANE. P. Bender, A. Günther, D. Honecker, A. Wiedenmann, S. Disch, A. Tschöpe, A. Michels, and R. Birringer, Nanoscale 7, 17122-17130 (2015). doi: 10.1039/C5NR04243G

Dipolar spin-misalignment correlations in inhomogeneous magnets: Comparison between neutron scattering and micromagnetic approaches. S. Erokhin, D. Berkov, and A. Michels, Phys. Rev. B 92, 014427 (2015). doi: 10.1103/PhysRevB.92.014427

Small-angle neutron scattering correlation functions of bulk magnetic materials. D. Mettus and A. Michels, J. Appl. Cryst. 48, 1437-1450 (2015). doi: 10.1107/S1600576715013187

Synthesis and magnetic properties of Ta/NdFeB-based composite microwires. P. Szary, I. Luciu, D. Duday, E.A. Périgo, T. Wirtz, P. Choquet, and A. Michels, J. Appl. Phys. 117, 17D134 (2015). doi: 10.1063/1.4917058

Comment on “Origin of surface canting within Fe₃ O₄ nanoparticles”. A. Michels, D. Honecker, S. Erokhin, and D. Berkov, Phys. Rev. Lett. 114, 149701 (2015). doi: 10.1103/PhysRevLett.114.149701

Third-order effect in magnetic small-angle neutron scattering by a spatially inhomogeneous medium. K.L. Metlov and A. Michels, Phys. Rev. B 91, 054404 (2015). doi: 10.1103/PhysRevB.91.054404

Magnetic SANS study of a sintered Nd-Fe-B magnet: estimation of defect size. E.A. Périgo, E.P. Gilbert, and A. Michels, Acta Mater. 87, 142-149 (2015). doi: 10.1016/j.actamat.2014.12.051

Small-angle neutron scattering of nanocrystalline gadolinium and holmium with random paramagnetic susceptibility. F. Döbrich, J.-P. Bick, R. Birringer, M. Wolff, J. Kohlbrecher, and A. Michels, J. Phys.: Condens. Matter 27, 046001 (2015). doi: 10.1088/0953-8984/27/4/046001

2014

Experimental observation of magnetic poles inside bulk magnets via q ≠ 0 Fourier modes of magnetostatic field. E.A. Périgo, E.P. Gilbert, K.L. Metlov, and A. Michels, New J. Phys. 16, 123031 (2014). doi: 10.1088/1367-2630/16/12/123031

Magnetic small-angle neutron scattering of bulk ferromagnets. A. Michels, J. Phys.: Condens. Matter 26, 383201 (2014) (Topical Review). doi: 10.1088/0953-8984/26/38/383201

Nd-enriched particles prepared from NdFeB magnets: A potential separation route. C. Fredericci, M.F. de Campos, A.P.V. Braga, D.J. Nazarre, R.V. Martin, F.J.G. Landgraf, and E.A. Périgo, J. Alloys Comp. 615, 410-414 (2014). doi: 10.1016/j.jallcom.2014.06.203

Magnetic field dependent small-angle neutron scattering on a Co nanorod array: evidence for intraparticle spin misalignment. A. Günther, J.-P. Bick, P. Szary, D. Honecker, C.D. Dewhurst, U. Keiderling, A.V. Feoktystov, A. Tschöpe, R. Birringer, and A. Michels, J. Appl. Cryst. 47, 992-998 (2014). doi: 10.1107/S1600576714008413

A static measurement system for soft magnetic materials. R.V Martin and E.A. Périgo, IEEE Trans. Magn. 50, 6000104 (2014). doi: 10.1109/TMAG.2013.2285730

Critical behaviour of nanocrystalline gadolinium: evidence for random uniaxial dipolar universality class. A. Ferdinand, A.-C. Probst, A. Michels, R. Birringer, and S.N. Kaul, J. Phys.: Condens. Matter 26, 056003 (2014). doi: 10.1088/0953-8984/26/5/056003

Micromagnetic simulation of magnetic small-angle neutron scattering from two-phase nanocomposites. A. Michels, S. Erokhin, D. Berkov, and N. Gorn, Journal of Magnetism and Magnetic Materials (Current Perspectives on Neutron Scattering) 350, 55-68 (2014). doi: 10.1016/j.jmmm.2013.09.031

2013

On the specific absorption rate of hyperthermia fluids. E.A. Périgo, F.A. Sampaio, and M.F. de Campos, Appl. Phys. Lett. 103, 264107 (2013). doi: 10.1063/1.4860966

Analysis of magnetic neutron-scattering data of two-phase ferromagnets. D. Honecker, C.D. Dewhurst, K. Suzuki, S. Erokhin, and A. Michels, Phys. Rev. B 88, 094428 (2013). doi: 10.1103/PhysRevB.88.094428

Exchange-stiffness constant of a Nd-Fe-B based nanocomposite determined by magnetic neutron scattering. J.-P. Bick, K. Suzuki, E.P. Gilbert, E.M. Forgan, R. Schweins, P. Lindner, C. Kübel, and A. Michels, Appl. Phys. Lett. 103, 122402 (2013). doi: 10.1063/1.4821453

How extrinsic is the coercivity in NdFeB bonded magnets? E.A. Périgo, I.A. Cruz, B. Antunes, A.P.V. Braga, and F.J.G. Landgraf, IEEE Trans. Magn. 49, 5043-5047 (2013). doi: 10.1109/TMAG.2013.2253788

Magnetic field and gradient standards using permanent magnets: design considerations, construction and validation by nuclear magnetic resonance. E.A. Périgo and R.V. Martin, IEEE Trans. Magn. 49, 4717-4720 (2013). doi: 10.1109/TMAG.2013.2255866

Stoner-Wohlfarth model for the anisotropic case. M.F. de Campos, F.A. Sampaio da Silva, E.A. Périgo, and J.A. de Castro, J. Magn. Magn. Mater. 345, 147-152 (2013). doi: 10.1016/j.jmmm.2007.03.098

Theory of magnetic small-angle neutron scattering of two-phase ferromagnets. D. Honecker and A. Michels, Phys. Rev. B 87, 224426 (2013). doi: 10.1103/PhysRevB.87.224426

Autocorrelation function of the spin misalignment in magnetic SANS: application to nanocrystalline metals. A. Michels and J.-P. Bick, J. Appl. Cryst. 46, 788-790 (2013). doi: 10.1107/S0021889813005402

Magnetic ordering in nanocrystalline gadolinium: A neutron diffraction study. D.H. Ryan, A. Michels, F. Döbrich, R. Birringer, Z. Yamani, and J.M. Cadogan, Phys. Rev. B 87, 064408 (2013). doi: 10.1103/PhysRevB.87.064408

Magnetization reversal in Nd-Fe-B based nanocomposites as seen by magnetic small-angle neutron scattering. J.-P. Bick, D. Honecker, F. Döbrich, K. Suzuki, E.P. Gilbert, H. Frielinghaus, J. Kohlbrecher, J. Gavilano, E.M. Forgan, R. Schweins, P. Lindner, R. Birringer, and A. Michels, Appl. Phys. Lett. 102, 022415 (2013). https://doi.org/10.1063/1.4776708

2012

Observation of cross-shaped anisotropy in spin-resolved small-angle neutron scattering. A. Michels, D. Honecker, F. Döbrich, C.D. Dewhurst, K. Suzuki, and A. Heinemann, Phys. Rev. B 85, 184417 (2012). doi: 10.1103/PhysRevB.85.184417

Magnetic neutron scattering on nanocomposites: Decrypting cross-section images using micromagnetic simulations. S. Erokhin, D. Berkov, N. Gorn, and A. Michels, Phys. Rev. B 85, 134418 (2012). doi: 10.1103/PhysRevB.85.134418

Neutron scattering study of the magnetic microstructure of nanocrystalline gadolinium. F. Döbrich, J. Kohlbrecher, M. Sharp, H. Eckerlebe, R. Birringer, and A. Michels, Phys. Rev. B 85, 094411 (2012). doi: 10.1103/PhysRevB.85.094411

Micromagnetic modeling and small-angle neutron scattering characterization of magnetic nanocomposites. S. Erokhin, D. Berkov, N. Gorn, and A. Michels, Phys. Rev. B 85, 024410 (2012). (Editors’ Suggestion) doi: 10.1103/PhysRevB.85.024410

2011

New methodology for micromagnetic simulations of nanocomposites with applications to SANS experiments. S. Erokhin, D. Berkov, N. Gorn, and A. Michels, IEEE Trans. Magn. 47, 3044-3047 (2011). doi: 10.1109/TMAG.2011.2143395

Influence of crystallite size and temperature on the antiferromagnetic helices of terbium and holmium metal. A. Michels, J.-P. Bick, R. Birringer, A. Ferdinand, J. Baller, R. Sanctuary, S. Philippi, D. Lott, S. Balog, E. Rotenberg, G. Kaindl, and K.M. Döbrich, Phys. Rev. B 83, 224415 (2011). doi: 10.1103/PhysRevB.83.224415

Small-angle neutron scattering with one-dimensional polarization analysis. A. Michels, D. Honecker, F. Döbrich, C.D. Dewhurst, A. Wiedenmann, C. Gómez-Polo, and K. Suzuki, Neutron News 22, 15-19 (2011).doi: 10.1080/10448632.2011.598801

Neutron spin-flip scattering of nanocrystalline cobalt. D. Honecker, F. Döbrich, C.D. Dewhurst, A. Wiedenmann, and A. Michels, J. Phys.: Condens. Matter 23, 016003 (2011). doi: 10.1088/0953-8984/23/1/016003

2010

Correlation functions of the spin misalignment in magnetic small-angle neutron scattering. A. Michels, Phys. Rev. B 82, 024433 (2010). doi: 10.1103/PhysRevB.82.024433

Longitudinal polarization analysis in small-angle neutron scattering. D. Honecker, A. Ferdinand, F. Döbrich, C.D. Dewhurst, A. Wiedenmann, C. Gómez-Polo, K. Suzuki, and A. Michels, Eur. Phys. J. B 76, 209-213 (2010). doi: 10.1140/epjb/e2010-00191-5

2009

Grain-boundary-induced spin disorder in nanocrystalline gadolinium. F. Döbrich, M. Elmas, A. Ferdinand, J. Markmann, M. Sharp, H. Eckerlebe, J. Kohlbrecher, R. Birringer, and A. Michels, J. Phys.: Condens. Matter 21, 156003 (2009). doi: 10.1088/0953-8984/21/15/156003

Porosity-induced spin disorder in nanocrystalline inert-gas condensed iron. A. Michels, M. Elmas, F. Döbrich, M. Ames, J. Markmann, M. Sharp, H. Eckerlebe, J. Kohlbrecher, and R. Birringer, EPL 85, 47003 (2009). doi: 10.1209/0295-5075/85/47003

Grain-size-dependent magnetic susceptibility of nanocrystalline terbium. S. Philippi, J. Markmann, R. Birringer, and A. Michels, J. Appl. Phys. 105, 07A701 (2009). doi: 10.1063/1.3055342

2008

Unraveling the nature of room temperature grain growth in nanocrystalline materials. M. Ames, J. Markmann, R. Karos, A. Michels, A. Tschöpe, and R. Birringer, Acta Mater. 56, 4255-4266 (2008). doi: 10.1016/j.actamat.2008.04.051

Magnetic-field-dependent small-angle neutron scattering on random anisotropy ferromagnets. A. Michels and J. Weissmüller, Rep. Prog. Phys. 71, 066501 (2008). doi: 10.1088/0034-4885/71/6/066501

Magnetic nanorods: genesis, self-organization and applications. R. Birringer, H. Wolf, C. Lang, A. Tschöpe, and A. Michels, Zeitschrift für Physikalische Chemie 222, 229-255 (2008). doi: 10.1524/zpch.2008.222.2-3.229

Magnetic domains and annealing-induced magnetic anisotropy in nanocrystalline soft magnetic materials. K. Suzuki, N. Ito, S. Saranu, U. Herr, A. Michels, and J.S. Garitaonandia, J. Appl. Phys. 103, 07E730 (2008). https://doi.org/10.1063/1.2835068

Spin structure of nanocrystalline gadolinium. A. Michels, F. Döbrich, M. Elmas, A. Ferdinand, J. Markmann, M. Sharp, H. Eckerlebe, J. Kohlbrecher, and R. Birringer, EPL 81, 66003 (2008). doi:10.1209/0295-5075/81/66003

Characterisation of the polarised neutron beam at the small angle scattering instrument SANS-I with a polarised proton target. V.K. Aswal, B. van den Brandt, P. Hautle, J. Kohlbrecher, J.A. Konter, A. Michels, F.M. Piegsa, J. Stahn, S. Van Petegem, and O. Zimmer, NIMA 586, 86-89 (2008). doi: 10.1016/j.nima.2007.11.062 

Angular dependence of coercivity and remanence of Ni nanowire arrays and its relevance to magnetoviscosity. A. Günther, S. Monz, A. Tschöpe, R. Birringer, and A. Michels, J. Magn. Magn. Mater. 320, 1340-1344 (2008). doi: 10.1016/j.jmmm.2007.11.019

Long range magnetic interactions in nanocrystalline ferromagnets. J. Weissmüller, U. Herr, H. Fecht, A. Grob, S. Rhaosaranu, A. Michels, and R. Viswanath, in Nanotechnology—Physics, Chemistry, and Biology of Functional Nanostructures, edited by Th. Schimmel, H. v. Löhneysen, Ch. Obermair and M. Barczewski, published by Landesstiftung Baden-Württemberg (Schriftenreihe 32), Stuttgart, pp. 373-402 (2008).

2007

Resonant microwave absorption determination of characteristic magnetic length in magnetic-field-annealed Vitroperm. G.A. Basheed, S.N. Kaul, and A. Michels, Appl. Phys. Lett. 91, 033105 (2007). https://doi.org/10.1063/1.2754362

Synthesis of a nanorod ferrofluid and characterisation by magnetic-field-dependent small-angle X-ray scattering. F. Döbrich, A. Michels, and R. Birringer, J. Magn. Magn. Mater. 316, e779-e782 (2007). doi: 10.1016/j.jmmm.2007.03.098 

Effect of magnetic field annealing on the soft magnetic properties of nanocrystalline materials. N. Ito, A. Michels, J. Kohlbrecher, J.S. Garitaonandia, K. Suzuki, and J.D. Cashion, J. Magn. Magn. Mater. 316, 458-461 (2007). doi: 10.1016/j.jmmm.2007.03.121

Temperature dependence of dipole-field scattering in Nanoperm. A. Michels, C. Vecchini, O. Moze, K. Suzuki, P.K. Pranzas, J. Kohlbrecher, and J. Weissmüller, J. Magn. Magn. Mater. 316, 448-450 (2007). doi: 10.1016/j.jmmm.2007.03.094 

Creating local contrast in small-angle neutron scattering by dynamic nuclear polarization. B. van den Brandt, H. Glättli, P. Hautle, J. Kohlbrecher, J.A. Konter, A. Michels, H.B. Stuhrmann, and O. Zimmer, J. Appl. Cryst. 40, s106-s110 (2007). doi: 10.1107/S0021889806052149

The influence of spin-misalignment scattering on the SANS data evaluation of martensitic age-hardening steels. M. Bischof, P. Staron, A. Michels, P. Granitzer, K. Rumpf, H. Leitner, C. Scheu, and H. Clemens, Acta Mater. 55, 2637-2646 (2007). doi: 10.1016/j.actamat.2006.12.004 

2006

Dipolar correlations in a nanocomposite: a neutron scattering study of Nanoperm Fe₈₉ Zr₇ B₃ Cu. A. Michels, C. Vecchini, O. Moze, K. Suzuki, P.K. Pranzas, J. Kohlbrecher, and J. Weissmüller, Phys. Rev. B 74, 134407 (2006). doi: 10.1103/PhysRevB.74.134407

Small angle neutron scattering investigations of spin disorder in nanocomposite soft magnets. C. Vecchini, O. Moze, K. Suzuki, J.M. Cadogan, K. Pranzas, A. Michels, and J. Weissmüller, J. Alloys Comp. 423, 31-36 (2006). doi: 10.1016/j.jallcom.2005.12.046

Synthesis and magnetic properties of cobalt nanocubes. C.P. Gräf, R. Birringer, and A. Michels, Phys. Rev. B 73, 212401 (2006). doi: 10.1103/PhysRevB.73.212401

A neutron-scattering investigation of the magnetic structure and magnetic excitations in nanocrystalline Tb. C. Vecchini, O. Moze, A. Hoser, M. Prager, D. Argyriou, A. Michels, B. Roessli, J. Weissmüller, C. Lemier, and R.N.Viswanath, J. Appl. Phys. 99, 08F502 (2006). https://doi.org/10.1063/1.2165139

Time-resolved nuclear spin-dependent small-angle neutron scattering from polarised proton domains in deuterated solutions. B. van den Brandt, H. Glättli, I. Grillo, P. Hautle, H. Jouve, J. Kohlbrecher, J.A. Konter, E. Leymarie, S. Mango, R.P. May, A. Michels, H.B. Stuhrmann, and O. Zimmer, Eur. Phys. J. B 49, 157-165 (2006). https://doi.org/10.1140/epjb/e2006-00037-9

Probing dipolar angles in soft magnetic nanocomposites by small-angle neutron scattering. A. Michels and J. Weissmüller, Neutron News 17, 34-35 (2006).

2005

Neutron scattering and modeling of dipole-field-induced spin disorder in Nanoperm. C. Vecchini, O. Moze, K. Suzuki, P.K. Pranzas, J. Weissmüller, and A. Michels, Appl. Phys. Lett. 87, 202509 (2005). https://doi.org/10.1063/1.2132540

Dipole-field-induced spin disorder in a nanocomposite soft magnet. A. Michels, C. Vecchini, O. Moze, K. Suzuki, J.M. Cadogan, P.K. Pranzas, and J. Weissmüller, EPL 72, 249-255 (2005). doi: 10.1209/epl/i2005-10224-x

Production of ultracold neutrons from a cold neutron beam on a ² H₂  target. F. Atchison, B. van den Brandt, T. Brys, M. Daum, P. Fierlinger, P. Hautle, R. Henneck, S. Heule, M. Kasprzak, K. Kirch, J.A. Konter, A. Michels, A. Pichlmaier, M. Wohlmuther, A. Wokaun, K. Bodek, U. Szerer, P. Geltenbort, J. Zmeskal, and Y. Pokotilovskiy, Phys. Rev. C 71, 054601 (2005). doi: 10.1103/PhysRevC.71.054601

Investigation of solid deuterium for UCN sources. F. Atchison, B. Blau, K. Bodek, B. van den Brandt, T. Brys, M. Daum, P. Fierlinger, P. Geltenbort, M. Giersch, P. Hautle, R. Henneck, S. Heule, M. Hino, M. Kasprzak, K. Kirch, J. Kohlbrecher, J.A. Konter, G. Kühne, M. Kuzniak, A. Michels, A. Pichlmaier, C. Plonka, Y. Pokotilovskiy, U. Szerer, M. Utsuro, M. Wohlmuther, A. Wokaun, and J. Zmeskal, in Proceedings of the 17th Meeting of the International Collaboration on Advanced Neutron Sources, ICANS-XVII, Santa Fe, NM, USA (2005).

High-accuracy measurement of the spin-dependent neutron scattering length of the deuteron. B. van den Brandt, P. Hautle, J. Kohlbrecher, J.A. Konter, A. Michels, H. Glättli, H.W. Griesshammer, F.M. Piegsa, and O. Zimmer, in Proceedings of the 16th International Spin Physics Symposium and Workshop on Polarized Electron Sources and Polarimeters, edited by K. Aulenbacher, F. Bradamante, A. Bressan and A. Martin, published by World Scientific, Singapore, pp. 669-672 (2005).

2004

Characteristic magnetic length-scales in Vitroperm—combining Kerr microscopy and small-angle neutron scattering. A. Grob, S. Saranu, U. Herr, A. Michels, R.N. Viswanath, and J. Weissmüller, Phys. Status Solidi A 201, 3354-3360 (2004). doi: 10.1002/pssa.200405533

An experimental approach to the dynamics of nuclear polarisation. B. van den Brandt, H. Glättli, I. Grillo, P. Hautle, H. Jouve, J. Kohlbrecher, J.A. Konter, E. Leymarie, S. Mango, R. May, A. Michels, H.B. Stuhrmann, and O. Zimmer, NIMA 526, 81-90 (2004). doi: 10.1016/j.nima.2004.03.155

Spin structure of nanocrystalline terbium. J. Weissmüller, A. Michels, D. Michels, A. Wiedenmann, C.E. Krill III, H.M. Sauer, and R. Birringer, Phys. Rev. B 69, 054402 (2004). doi: 10.1103/PhysRevB.69.054402

Neutronen sehen Spinorientierung auf Nanoskala. J. Weissmüller and A. Michels, Physik in unserer Zeit 35 (Issue 3), 112 (2004). doi: 10.1002/piuz.200490040

2003

Range of magnetic correlations in nanocrystalline soft magnets. A. Michels, R.N. Viswanath, J.G. Barker, R. Birringer, and J. Weissmüller, Phys. Rev. Lett. 91, 267204 (2003). doi: 10.1103/PhysRevLett.91.267204

Domain formation and long-range spin disorder in Vitroperm. A. Michels, R.N. Viswanath, and J. Weissmüller, EPL 64, 43-49 (2003). doi: 10.1209/epl/i2003-00123-2

A comparison of torque-strengths in micromagnetics. A. Michels and J. Weissmüller, J. Magn. Magn. Mater. 258-259, 11-14 (2003). doi: 10.1016/S0304-8853(02)00996-4

2002

A lower bound for the volume-averaged mean-square magnetostatic stray field. A. Michels, J. Weissmüller, and R. Birringer, Eur. Phys. J. B 29, 533-540 (2002). https://doi.org/10.1140/epjb/e2002-00336-1

On the influence of anisotropy on the magnetic small-angle neutron scattering of superparamagnetic particles. A. Michels and J. Weissmüller, Eur. Phys. J. B 26, 57-65 (2002). https://doi.org/10.1140/epjb/e20020066

Measurement of a magnetic-field dependent correlation length in nanocrystalline Ni using small-angle neutron scattering. A. Michels, J. Weissmüller, U. Erb, and J.G. Barker, Phys. Status Solidi A 189, 509-513 (2002). doi: 10.1002/1521-396X(200202)189:2<509::AID-PSSA509>3.0.CO;2-C

Magnetic microstructure and properties of the nanocrystalline hard magnet terbium. J. Weissmüller, D. Michels, A. Michels, C.E. Krill, A. Wiedenmann, and N.S. Gajbhiye, Phys. Status Solidi A 189, 495-498 (2002). doi: 10.1002/1521-396X(200202)189:2<495::AID-PSSA495>3.0.CO;2-X

Tomography with high resolution. C. Rau, T. Weitkamp, A.A. Snigirev, C.G. Schroer, B. Benner, J. Tuemmler, T.F. Guenzler, M. Kuhlmann, B. Lengeler, C.E. Krill III, K. Doebrich, D. Michels, and A. Michels, Proceedings of SPIE 4503, 14-22 (2002).

Tomographic characterization of grain-size correlations in polycrystalline Al-Sn. C.E. Krill III, K.M. Doebrich, D. Michels, A. Michels, C. Rau, T. Weitkamp, A.A. Snigirev, and R. Birringer, Proceedings of SPIE 4503, 205-212 (2002).

2001

Comment on “Magnetic correlations in nanostructured ferromagnets”. J. Weissmüller and A. Michels, Phys. Rev. Lett. 87, 149701 (2001). doi: 10.1103/PhysRevLett.87.149701

Magnetic small-angle neutron scattering by nanocrystalline terbium. J. Weissmüller, D. Michels, A. Michels, A. Wiedenmann, C.E. Krill, H.M. Sauer, and R. Birringer, Scripta Mater. 44, 2357-2361 (2001). doi: 10.1016/S1359-6462(01)00774-6

Analysis of the small-angle neutron scattering of nanocrystalline ferromagnets using a micromagnetics model. J. Weissmüller, A. Michels, J.G. Barker, A. Wiedenmann, U. Erb, and R.D. Shull, Phys. Rev. B 63, 214414 (2001). doi: 10.1103/PhysRevB.63.214414

2000

Measuring the exchange-stiffness constant of nanocrystalline solids by elastic small-angle neutron scattering. A. Michels, J. Weissmüller, A. Wiedenmann, J.S. Pedersen, and J.G. Barker, Phil. Mag. Lett. 80, 785-792 (2000). doi: 10.1080/0950083001000180S

Exchange-stiffness constant in cold-worked and nanocrystalline Ni measured by elastic small-angle neutron scattering. A. Michels, J. Weissmüller, A. Wiedenmann, and J.G. Barker, J. Appl. Phys. 87, 5953-5955 (2000). https://doi.org/10.1063/1.372577

1999

Small-angle neutron scattering by the magnetic microstructure of nanocrystalline ferromagnets near saturation. J. Weissmüller, R.D. McMichael, A. Michels, and R.D. Shull, J. Res. NIST 104, 261-275 (1999). http://dx.doi.org/10.6028/jres.104.019

Modelling the influence of grain-size-dependent solute drag on the kinetics of grain growth in nanocrystalline materials. A. Michels, C.E. Krill, H. Ehrhardt, R. Birringer, and D.T. Wu, Acta Mater. 47, 2143-2152 (1999). doi: 10.1016/S1359-6454(99)00079-8

1998

Grain-growth kinetics in nanocrystalline iron prepared by ball milling. A. Michels, C.E. Krill, H. Natter, and R. Birringer, in Grain Growth in Polycrystalline Materials III, edited by H. Weiland, B.L. Adams and A.D. Rollet, published by The Minerals, Metals & Materials Society, Warrendale, PA, USA, pp. 449-454 (1998).