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Ce3-xMgxCo9: Transformation of a Pauli Paramagnet into a Strong Permanent Magnet

TitleCe3-xMgxCo9: Transformation of a Pauli Paramagnet into a Strong Permanent Magnet
Publication TypeJournal Article
Year of Publication2018
AuthorsLamichhane, TN, Taufour, V, Palasyuk, A, Lin, QS, Bud'ko, SL, Canfield, PC
JournalPhysical Review Applied
Date Published02
Type of ArticleArticle
ISBN Number2331-7019
Accession NumberWOS:000426038500001
Keywordsphysics, single-crystals

= x less than or similar to 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 mu(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 CeCo3, may also conceal nearby ferromagnetic phases.

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