Overview of magnetoelastic coupling in (Mn, Fe)<sub>2</sub>(P, Si)-type magnetocaloric materials

Journal article (2018)

Authors

X.F. Miao Nanjing University
Shu Yuan Hu 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
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Hysteresis Magnetocaloric effect (Mn, Fe)(P, Si) Magnetoelastic coupling Mechanical stability
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Published Date

2018

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

(MnFe)2(P, Si)-type compounds are, to date, one of the best candidates for magnetic refrigeration and energy conversion applications due to the combination of giant magnetocaloric effect (MCE), tunable working temperature range and low material cost. The giant MCE in the (Mn, Fe)2(P, Si)-type compounds originates from strong magnetoelastic coupling, where the lattice degrees of freedom and spin degrees of freedom are efficiently coupled. The tunability of the phase transition, in terms of the critical temperature and the character of the phase transition, is essentially attributed to the changes in the magnetoelastic coupling in the (Mn, Fe)2(P, Si)-type compounds. In this review, not only the fundamentals of the magnetoelastic coupling but also the related practical aspects such as magnetocaloric performance, hysteresis issue and mechanical stability are discussed for the (Mn, Fe)2(P, Si)-type compounds. Additionally, some future fundamental studies on the MCE as well as possible ways of solving the hysteresis and fracture issues are proposed.