Tuning magnetocrystalline anisotropy by cobalt alloying in hexagonal Fe3Ge1

Mcguire, Michael; Kavungal Veedu, Shanavas; Kesler, Michael S.; Parker, David S.

doi:10.1038/s41598-018-32577-x

Tuning magnetocrystalline anisotropy by cobalt alloying in hexagonal Fe₃Ge₁

Journal Article · Fri Sep 21 00:00:00 EDT 2018 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-018-32577-x· OSTI ID:1482435

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Here, we show using both experimental and theoretical methods that cobalt substitution in the hexagonal ferromagnet Fe₃Ge suppresses the planar magnetic anisotropy and favors a uniaxial state. Uniaxial ferromagnetism is observed at room temperature for cobalt concentrations of only a few percent, and 10% substitution fully suppresses the planar magnetic structure at least down to 5 K, with only a small effect on the magnetization and Curie temperature. First principles calculations predict strong uniaxial magnetocrystalline anisotropy and promising permanent magnet properties for higher cobalt concentrations. Finally, although these high Co concentrations were not realized experimentally, this work suggests that the rare-earth-free Fe₃Ge structure supports intrinsic magnetic properties that may enable promising permanent magnet performance.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1482435

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (1)

Reorientation of antiferromagnetism in cobalt doped FeSn Meier, William R.; Yan, Jiaqiang; McGuire, Michael A. Physical Review B, Vol. 100, Issue 18 https://doi.org/10.1103/physrevb.100.184421	journal	November 2019

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