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Journal Articles

Fingerprint of vortexlike flux closure in an isotropic Nd-Fe-B bulk magnet

Bersweiler, M.*; Oba, Yojiro; Sinaga, E. P.*; Peral, I.*; Titov, I.*; Adams, M. P.*; Rai, V.*; Metlov, K. L.*; Michels, A.*

Physical Review B, 108(9), p.094434_1 - 094434_7, 2023/09

Journal Articles

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

Bersweiler, M.*; Sato, Hirokazu*; Adachi, Nozomu*; Todaka, Yoshikazu*; Peral, I.*; Kohlbrecher, J.*; Zaporozhets, V. D.*; Metlov, K. L.*; Michels, A.*; Oba, Yojiro

IUCrJ, 10(4), p.411 - 419, 2023/07

 Times Cited Count:1 Percentile:87.7

Journal Articles

Role of higher-order effects in spin-misalignment small-angle neutron scattering of high-pressure torsion nickel

Oba, Yojiro; Bersweiler, M.*; Titov, I.*; Adachi, Nozomu*; Todaka, Yoshikazu*; Gilbert, E. P.*; Steinke, N.-J.*; Metlov, K. L.*; Michels, A.*

Physical Review Materials (Internet), 5(8), p.084410_1 - 084410_9, 2021/08

 Times Cited Count:3 Percentile:22.98(Materials Science, Multidisciplinary)

Journal Articles

Revealing defect-induced spin disorder in nanocrystalline Ni

Bersweiler, M.*; Sinaga, E. P.*; Peral, I.*; Adachi, Nozomu*; Bender, P.*; Steinke, N.-J.*; Gilbert, E. P.*; Todaka, Yoshikazu*; Michels, A.*; Oba, Yojiro

Physical Review Materials (Internet), 5(4), p.044409_1 - 044409_7, 2021/04

 Times Cited Count:7 Percentile:49.88(Materials Science, Multidisciplinary)

Journal Articles

Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids

Althammer, M.*; Meyer, S.*; Nakayama, Hiroyasu*; Schreier, M.*; Altmannshofer, S.*; Weiler, M.*; Huebl, H.*; Gepr$"a$gs, S.*; Opel, M.*; Gross, R.*; et al.

Physical Review B, 87(22), p.224401_1 - 224401_15, 2013/06

 Times Cited Count:399 Percentile:99.41(Materials Science, Multidisciplinary)

We experimentally investigate and quantitatively analyze the spin Hall magnetoresistance (SMR) effect in ferromagnetic insulator (FI)/Pt and FI/nonmagnetic metal/Pt hybrid structures. For the FI, we use either YIG, nickel ferrite, or magnetite and for the nonmagnet, Cu or Au. The SMR is theoretically ascribed to the combined action of spin Hall and inverse spin Hall effect in the Pt top layer. It therefore should characteristically depend upon the orientation of the magnetization in the adjacent ferromagnet and prevail even if an additional, nonmagnetic metal layer is inserted between Pt and the ferromagnet. Our experimental data corroborate these theoretical conjectures. Using the SMR theory to analyze our data, we extract the spin Hall angle and the spin diffusion length in Pt. For a spin-mixing conductance of $$4times 10^{14}Omega^{-1}$$m$$^{-2}$$, we obtain a spin Hall angle of 0.11 $$pm$$ 0.08 and a spin diffusion length of (1.5 $$pm$$ 0.5) nm for Pt in our samples.

Oral presentation

Revealing defect-induced spin disorder in nanocrystalline Ni

Bersweiler, M.*; Sinaga, E. P.*; Peral, I.*; Adachi, Nozomu*; Bender, P.*; Steinke, N.-J.*; Gilbert, E. P.*; Todaka, Yoshikazu*; Oba, Yojiro; Michels, A.*

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