: Transformation of a Pauli Paramagnet into a Strong Permanent Magnet
- Ames Lab. and Iowa State Univ., Ames, IA (United States) and Dept. of Physics and Astronomy
- Ames Lab. and Iowa State Univ., Ames, IA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
In this article we report on the synthesis of single-crystal and polycrystalline samples of Ce3-xMgxCo9 solid solution (0 ≤ x ≲ 1.4) and characterization of their structural and magnetic properties. The crystal structure remains rhombohedral in the whole composition range and Mg partially replaces Ce in the 6c site of the CeCo3 structure. Ferromagnetism is induced by Mg substitutions starting as low as x = 0.18 and reaching a Curie temperature as high as 450 K for x = 1.35 . Measurements on single crystals with x = 1.34 and TC = 440 K indicate an axial magnetic anisotropy with an anisotropy field of 6 T and a magnetization of 6 μB/f.u. at 300 K. Coercicity is observed in the polycrystalline samples consistent with the observed axial magnetic anisotropy. Our discovery of ferromagnetism with large axial magnetic anisotropy induced by substituting a rare-earth element by Mg is a very promising result in the search of inexpensive permanent-magnet materials and suggests that other nonmagnetic phases, similar to CeCo3, may also conceal nearby ferromagnetic phases.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1422758
- Alternate ID(s):
- OSTI ID: 1422437
- Report Number(s):
- IS-J--9568; {"","Journal ID: ISSN 2331-7019","Journal ID: ISSN PRAHB2"}
- Journal Information:
- Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 2 Vol. 9; ISSN 2331-7019; ISSN PRAHB2
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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