2018/01/20 by Tej N. Lamichhane, Lamichhane, Tej N., Valentin Taufour +9
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds
paper · pdf · doi:10.48550/arxiv.1801.06743
openalex publication_date 2018/01/20 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28
We report on the synthesis of single crystalline and polycrystalline samples\nof Ce3-xMgxCo9 solid solution (0\≤ x lesssim 1.4) and\ncharacterization of their structural and magnetic properties. The crystal\nstructure remains rhombohedral in the whole composition range and Mg partially\nreplaces Ce in the 6\c site of the CeCo3 structure. Ferromagnetism\nis induced by Mg substitutions starting as low as x=0.18 and reaching a Curie\ntemperature as high as 450 ,K for x=1.35. Measurements on single crystals\nwith x=1.34 and T_ textrmC=440 ,K indicate an axial magnetic anisotropy\nwith the anisotropy field of 6 ,T and a magnetization of 6 ,\μB/f.u. at\n300 ,K. Coercicity is observed in the polycrystalline samples consistent with\nthe observed axial magnetic anisotropy. Our discovery of ferromagnetism with\nlarge axial magnetic anisotropy induced by substituting a rare-earth element by\nMg is a very promising result in the search of inexpensive permanent-magnet\nmaterials and suggests other non-magnetic phases, similar to CeCo3, may also\nconceal nearby ferromagnetic phases.\n