Borderline Magnetism: How Adding Mg to Paramagnetic CeCo3 Makes a 450-K Ferromagnet with Large Magnetic Anisotropy

Pandey, Tribhuwan; Parker, David S.

doi:10.1103/PhysRevApplied.10.034038

Title: Borderline Magnetism: How Adding $Mg$ to Paramagnetic $Ce {Co}_{3}$ Makes a 450-K Ferromagnet with Large Magnetic Anisotropy

Journal Article · 19 September 2018 · Physical Review Applied

DOI: https://doi.org/10.1103/PhysRevApplied.10.034038 · OSTI ID:1471925

Pandey, Tribhuwan ^[1]; Parker, David S. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

A recent experimental study [Phys. Rev. Appl. 9, 024023 (2018)] on paramagnetic CeCo₃ finds that magnesium alloying induces a ferromagnetic transition with intrinsic properties large enough for permanent magnet applications. Here we explain these surprising results via a first-principles study of the electronic structure and magnetism of magnesium-alloyed CeCo₃. We find the origin of this magnesium-induced ferromagnetic transition to be Stoner physics—the substantial increase in the Fermi-level density of states N(E_F) with Mg alloying. Here, our calculations suggest that both Ce and Co atoms are likely to be important for generating large magnetic anisotropy suggesting the viability of Co-3d and Ce-4f interaction for the generation of magnetic anisotropy in magnetic materials. These results offer a route to the discovery of ferromagnetic materials and provide fundamental insight into the magnetic properties of these alloys.

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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:: 1471925

Alternate ID(s):: OSTI ID: 1471445

Journal Information:: Physical Review Applied, Vol. 10, Issue 3; ISSN 2331-7019

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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