Borderline Magnetism: How Adding to Paramagnetic Makes a 450-K Ferromagnet with Large Magnetic Anisotropy
Abstract
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.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Publication Date:
- 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
Citation Formats
Pandey, Tribhuwan, and Parker, David S. Borderline Magnetism: How Adding Mg to Paramagnetic CeCo3 Makes a 450-K Ferromagnet with Large Magnetic Anisotropy. United States: N. p., 2018.
Web. doi:10.1103/PhysRevApplied.10.034038.
Pandey, Tribhuwan, & Parker, David S. Borderline Magnetism: How Adding Mg to Paramagnetic CeCo3 Makes a 450-K Ferromagnet with Large Magnetic Anisotropy. United States. https://doi.org/10.1103/PhysRevApplied.10.034038
Pandey, Tribhuwan, and Parker, David S. Wed .
"Borderline Magnetism: How Adding Mg to Paramagnetic CeCo3 Makes a 450-K Ferromagnet with Large Magnetic Anisotropy". United States. https://doi.org/10.1103/PhysRevApplied.10.034038. https://www.osti.gov/servlets/purl/1471925.
@article{osti_1471925,
title = {Borderline Magnetism: How Adding Mg to Paramagnetic CeCo3 Makes a 450-K Ferromagnet with Large Magnetic Anisotropy},
author = {Pandey, Tribhuwan and Parker, David S.},
abstractNote = {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.},
doi = {10.1103/PhysRevApplied.10.034038},
journal = {Physical Review Applied},
number = 3,
volume = 10,
place = {United States},
year = {2018},
month = {9}
}
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Figures / Tables:
FIG. 1: Schematic representation of the crystal structures of CeCo3. Nonequivalent Ce atoms are shown in magenta (Ce-3a) and cyan color (Ce-6c). The Nonequivalent Co-3b, and 6c, and 18h sites are shown by orange, green, and blue spheres, respectively. (b) The primitive cell used for calculating the properties.
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