Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets

Zhuravlev, I. A.; Antropov, V. P.; Belashchenko, K. D.

doi:10.1103/PhysRevLett.115.217201

Title: Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets

Journal Article · 15 November 2015 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.115.217201 · OSTI ID:1227443

Zhuravlev, I. A. ^[1]; Antropov, V. P. ^[2]; Belashchenko, K. D. ^[1]

Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
Ames Lab., Ames, IA (United States)

The origins of the anomalous temperature dependence of magnetocrystalline anisotropy in (Fe_1–xCo_x)₂B alloys are elucidated using first-principles calculations within the disordered local moment model. Excellent agreement with experimental data is obtained. The anomalies are associated with the changes in band occupations due to Stoner-like band shifts and with the selective suppression of spin-orbit “hot spots” by thermal spin fluctuations. Under certain conditions, the anisotropy can increase, rather than decrease, with decreasing magnetization. These peculiar electronic mechanisms are in stark contrast to the assumptions of the existing models.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1227443

Report Number(s):: IS-J-8818

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 115; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Giant magnetostriction effect near onset of spin reorientation in MnBi Choi, Y.; Ryan, P. J.; McGuire, M. A. Applied Physics Letters, Vol. 112, Issue 19 https://doi.org/10.1063/1.5026408	journal	May 2018
Perpendicular magnetic anisotropy in bulk and thin-film CuMnAs for antiferromagnetic memory applications Zhuravlev, I. A.; Adhikari, A.; Belashchenko, K. D. Applied Physics Letters, Vol. 113, Issue 16 https://doi.org/10.1063/1.5048207	journal	October 2018
Single-Crystal Permanent Magnets: Extraordinary Magnetic Behavior in the Ta -, Cu -, and Fe -Substituted Ce Co 5 Systems Lamichhane, Tej N.; Onyszczak, Michael T.; Palasyuk, Olena Physical Review Applied, Vol. 11, Issue 1 https://doi.org/10.1103/physrevapplied.11.014052	journal	January 2019
Interfacial spin Hall effect and spin swapping in Fe-Au bilayers from first principles Li, Song; Shen, Ka; Xia, Ke Physical Review B, Vol. 99, Issue 13 https://doi.org/10.1103/physrevb.99.134427	journal	April 2019
Electronic transport and phonon properties of maximally disordered alloys: From binaries to high-entropy alloys Mu, Sai; Pei, Zongrui; Liu, Xianglin Journal of Materials Research, Vol. 33, Issue 19 https://doi.org/10.1557/jmr.2018.300	journal	September 2018
Interfacial spin Hall effect and spin swapping in Fe\|Au bilayer from first principles Li, Song; Shen, Ka; Xia, Ke arXiv https://doi.org/10.48550/arxiv.1807.03433	text	January 2018
Perpendicular magnetic anisotropy in bulk and thin-film CuMnAs for antiferromagnetic memory applications Zhuravlev, I. A.; Adhikari, A.; Belashchenko, K. D. arXiv https://doi.org/10.48550/arxiv.1810.00249	text	January 2018

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