Magnetostructural transitions in V-doped MnCoGe compounds

J. H. Shi; H. G. Zhang; Imam Hidayah; B. T. Song; H. Yao; M. Yue; Z. Altounian

doi:10.1063/1.5130029

AIP Advances (Feb 2020)

Magnetostructural transitions in V-doped MnCoGe compounds

J. H. Shi,
H. G. Zhang,
Imam Hidayah,
B. T. Song,
H. Yao,
M. Yue,
Z. Altounian

Affiliations

J. H. Shi: College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
H. G. Zhang: College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
Imam Hidayah: College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
B. T. Song: College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
H. Yao: College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
M. Yue: College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
Z. Altounian: Physics Department and Centre for Physics of Materials, McGill University, Montreal, Quebec H3A 2T8, Canada

DOI: https://doi.org/10.1063/1.5130029
Journal volume & issue: Vol. 10, no. 2
pp. 025325 – 025325-6

Abstract

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MnCoGe1-xVx (x = 0.005, 0.01, 0.015, 0.02, 0.03, and 0.04) compounds were synthesized and investigated in view of the effect of transition metals on main-group-element sites to the magnetostructural transition. A small amount of V doping results in a decrease of the martensitic transformation temperature, while a further increase of V disturbs the Co-Ge bonds hence destabilizing the MM’X phase. Therefore, the transformation temperature returns to high temperature, and the expected Curie temperature window becomes incomplete. Accordingly, a large magnetic entropy change of about 10 J/kg·K and a refrigerant capacity of about 129.5 J/kg is obtained in the series.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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