Ultra-low Hysteresis in Giant Magnetocaloric Mn<sub>1-x</sub>V<sub>x</sub>Fe<sub>0.95</sub>(P,Si,B) Compounds

Journal article (2022)

Authors

J. Lai RST/Fundamental Aspects of Materials and Energy - AS , South China University of Technology
X. You RST/Fundamental Aspects of Materials and Energy - AS
Jiayan Law University of Seville
Victorino Franco University of Seville
B. Huang RST/Fundamental Aspects of Materials and Energy - AS , South China University of Technology
Dimitrios Bessas European Synchrotron Radiation Facility, F-38043, Grenoble, France
M. Maschek RST/Fundamental Aspects of Materials and Energy - AS
Dechang Zeng South China University of Technology
N.H. van Dijk RST/Fundamental Aspects of Materials and Energy - AS
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2022 J. Lai, X. You, Jiayan Law, Victorino Franco, B. Huang, Dimitrios Bessas, M. Maschek, Dechang Zeng, N.H. van Dijk, E.H. Brück
DOI
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https://doi.org/10.1016/j.jallcom.2022.167336
Entropy (Mn, V, Fe)1.95(P, Si,B) Giant magnetocaloric effect Magnetic properties Low hysteresis
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Published Date

2022

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

Large thermal hysteresis in the (Mn,Fe)2(P,Si) system hinders an efficient heat exchange and thus limits the magnetocaloric applications. Substitution of manganese by vanadium in the Mn1-x1Vx1Fe0.95P0.593Si0.33B0.077 and Mn1-x2Vx2Fe0.95P0.563Si0.36B0.077 compounds enable a significant reduction in the thermal hysteresis without losing the giant magnetocaloric effect. For the composition closest to the critical one, where first-order crossovers to second-order phase transition in the series of x2 = 0.02, Mn0.98V0.02Fe0.95P0.563Si0.36B0.077 exhibits a thermal hysteresis that is reduced from 1.5 to 0.5 K by 67%, yielding an adiabatic temperature change of 2.3 K and magnetic entropy change of 5.6 J/kgK for an applied field of 1 T, which demonstrates its potential for highly efficient magnetic heat pumps utilizing low-cost permanent magnets.