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

Journal Article · · Physical Review Applied
 [1];  [1]
  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(EF) 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.

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, Journal Name: Physical Review Applied Journal Issue: 3 Vol. 10; ISSN 2331-7019; ISSN PRAHB2
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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