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arXiv · 1810.09902

Ultra-low Hysteresis in Giant Magnetocaloric Mn1-xVxFe(P,Si,B) Compounds

Jiawei Lai·Bowei Huang·Dimitrios Bessas·Xinmin You·Michael Maschek·Dechang Zeng·L. Zhang·Niels van Dijk·Ekkes Bruck
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Abstract

Large thermal hysteresis in the MnFe(P, Si, B) system hinders the heat exchange rate and thus limits the magnetocaloric applications at high frequencies. Substitution of Mn by V in Mn1-xVxFe0.95P0.593Si0.33B0.077 and Mn1-xVxFe0.95P0.563Si0.36B0.077 alloys was found to reduce the thermal hysteresis due to a decrease in the latent heat. Introducing V increases both the field-induced transition temperature shift and the magnetic moment per formula unit. Thus, a decease in the thermal hysteresis is obtained without losing the giant magnetocaloric effect. In consequence, an ultralow hysteresis (0.7 K) and a giant adiabatic temperature change of 2.3 K were achieved, which makes these alloys promising candidates for commercial magnetic refrigerator using permanent magnets.

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Jiawei Lai, Bowei Huang, Dimitrios Bessas, Xinmin You, Michael Maschek, Dechang Zeng, L. Zhang, Niels van Dijk, Ekkes Bruck. 2018-10-23. Ultra-low Hysteresis in Giant Magnetocaloric Mn1-xVxFe(P,Si,B) Compounds. https://arxiv.org/abs/1810.09902

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