Small hysteresis and giant magnetocaloric effect in Nb-substituted (Mn,Fe)2(P,Si) alloys

Journal article (2019)

Authors

Shuyuan Hu Nanjing University of Science and Technology
Xuefei Miao Nanjing University of Science and Technology
Feng Xu Nanjing University of Science and Technology
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
J. Liu RST/Fundamental Aspects of Materials and Energy - AS , Nanjing University of Science and Technology
Zhiqiang Ou Inner Mongolia Normal University China
Mengqi Cong Jiangsu University of Technology
O. Haschuluu Inner Mongolia Normal University China
Yuanyuan Gong Nanjing University of Science and Technology
Fengjiao Qian Nanjing University of Science and Technology, Nanjing, China
Yurong You Nanjing University of Science and Technology
Yujing Zhang Nanjing University of Science and Technology
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
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Published Date

2019-11

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

The influence of Nb substitution on the structure, magnetoelastic transition and magnetocaloric properties has been investigated for the Mn1.1Fe0.85-xNbxP0.43Si0.57 alloys. The substitution for Fe by merely 4.7 at.% Nb (i.e. x = 0.04) significantly diminishes the thermal hysteresis from 10 to 1 K due to the reduced structural discontinuity crossing the magnetoelastic transition. This also improves the mechanical stability. The Curie temperature of the magnetoelastic transition is lowered by approximately 11.6 K per at.% of the Nb substitution, originating from the enhanced covalent bonding that favors the paramagnetic state. The giant magnetocaloric effect is still retained in the Nb-substituted alloys.

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