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Title: Ce 3 - x Mg x Co 9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet

In this article we report on the synthesis of single-crystal and polycrystalline samples of Ce 3-xMg xCo 9 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 CeCo 3 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 T C = 440 K indicate an axial magnetic anisotropy with an anisotropy field of 6 T and a magnetization of 6 μ B/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 CeCo 3, may also conceal nearby ferromagnetic phases.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States) and Dept. of Physics and Astronomy
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-9568
Journal ID: ISSN 2331-7019; PRAHB2; TRN: US1801654
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 9; Journal Issue: 2; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
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)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
OSTI Identifier:
1422758
Alternate Identifier(s):
OSTI ID: 1422437

Lamichhane, Tej N., Taufour, Valentin, Palasyuk, Andriy, Lin, Qisheng, Bud’ko, Sergey L., and Canfield, Paul C.. Ce3-xMgxCo9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet. United States: N. p., Web. doi:10.1103/PhysRevApplied.9.024023.
Lamichhane, Tej N., Taufour, Valentin, Palasyuk, Andriy, Lin, Qisheng, Bud’ko, Sergey L., & Canfield, Paul C.. Ce3-xMgxCo9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet. United States. doi:10.1103/PhysRevApplied.9.024023.
Lamichhane, Tej N., Taufour, Valentin, Palasyuk, Andriy, Lin, Qisheng, Bud’ko, Sergey L., and Canfield, Paul C.. 2018. "Ce3-xMgxCo9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet". United States. doi:10.1103/PhysRevApplied.9.024023. https://www.osti.gov/servlets/purl/1422758.
@article{osti_1422758,
title = {Ce3-xMgxCo9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet},
author = {Lamichhane, Tej N. and Taufour, Valentin and Palasyuk, Andriy and Lin, Qisheng and Bud’ko, Sergey L. and Canfield, Paul C.},
abstractNote = {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.},
doi = {10.1103/PhysRevApplied.9.024023},
journal = {Physical Review Applied},
number = 2,
volume = 9,
place = {United States},
year = {2018},
month = {2}
}