Title: Borderline Magnetism: How Adding $\mathrm{Mg}$ to Paramagnetic $\mathrm{Ce}{\mathrm{Co}}_3$ Makes a 450-K Ferromagnet with Large Magnetic Anisotropy

Abstract

A recent experimental study [Phys. Rev. Appl. 9, 024023 (2018)] on paramagnetic CeCo ₃ 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 CeCo ₃. 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.

Authors:

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

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+ Show Author Affiliations

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

Publication Date:

2018-09-19

Research Org.:

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

Sponsoring Org.:

USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:

1471925

Alternate Identifier(s):

OSTI ID: 1471445

Grant/Contract Number:  

AC05-00OR22725

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review Applied

Additional Journal Information:

Journal Volume: 10; Journal Issue: 3; Journal ID: ISSN 2331-7019

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE