Ultra-low Hysteresis in Giant Magnetocaloric Mn&lt;sub&gt;1-x&lt;/sub&gt;V&lt;sub&gt;x&lt;/sub&gt;Fe&lt;sub&gt;0.95&lt;/sub&gt;(P,Si,B) Compounds

Lai, J.; You, X.; Law, Jiayan; Franco, Victorino; Huang, B.; Bessas, Dimitrios; Maschek, M.; Zeng, Dechang; van Dijk, N.H.; Brück, E.H.

doi:10.1016/j.jallcom.2022.167336

Ultra-low Hysteresis in Giant Magnetocaloric Mn_1-xV_xFe_0.95(P,Si,B) Compounds

Title

Ultra-low Hysteresis in Giant Magnetocaloric Mn_1-xV_xFe_0.95(P,Si,B) Compounds

Author

Lai, J. (TU Delft RST/Fundamental Aspects of Materials and Energy; South China University of Technology)
You, X. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Law, Jiayan (University of Seville)
Franco, Victorino (University of Seville)
Huang, B. (TU Delft RST/Fundamental Aspects of Materials and Energy; South China University of Technology)
Bessas, Dimitrios (European Synchrotron Radiation Facility, F-38043, Grenoble, France)
Maschek, M. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Zeng, Dechang (South China University of Technology)
van Dijk, N.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Brück, E.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)

Date

2022

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.

Subject

(Mn, V, Fe)1.95(P, Si,B)
Giant magnetocaloric effect
Magnetic properties
Entropy
Low hysteresis

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http://resolver.tudelft.nl/uuid:17ba9939-34b7-4480-a991-4075f1a2780c

DOI

https://doi.org/10.1016/j.jallcom.2022.167336

ISSN

0925-8388

Source

Journal of Alloys and Compounds, 930 (167336)

Part of collection

Institutional Repository