L. N. Khanov, A. M. Aliev, A. V. Mashirov, “Long-term effects of cyclic magnetic fields on the magnetocaloric properties of the Ni$_{43.18}$Mn$_{45.15}$In$_{11.67}$ Heusler alloy”, Fizika Tverdogo Tela, 2023, Volume 65, Issue 9,Pages 1560

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Magnetism

Long-term effects of cyclic magnetic fields on the magnetocaloric properties of the Ni$_{43.18}$Mn$_{45.15}$In$_{11.67}$ Heusler alloy

L. N. Khanov^a, A. M. Aliev^a, A. V. Mashirov^b

^a Daghestan Institute of Physics after Amirkhanov, Makhachkala, Russia
^b Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, Moscow, Russia

Abstract: The thermal expansion $(\Delta l/l_0)$, magnetocaloric effect $(\Delta T_{ad})$ and the magnetostriction $(\lambda)$ of a polycrystalline sample of the Ni$_{43.18}$Mn$_{45.15}$In$_{11.67}$ Heusler alloy were studied. A correlation has been established between the magnetocaloric effect and magnetostriction. The smaller value of the MCE in the cooling run can be explained by the smaller contribution of the lattice subsystem to the total measured MCE. It is found that the long-term action of the cyclic magnetic field results in a decrease in the value of $(\Delta T_{ad})$ in the region of the first-order magnetostructural phase transition. The virgin properties of the alloy can be restored by transformation the sample to the austenite phase. The Heusler alloy Ni$_{43.18}$Mn$_{45.15}$In$_{11.67}$ can be used as a working body in magnetic cooling technology, provided that the alloy periodically transforms to the austenite phase.

Keywords: Heusler alloys, thermal expansion, magnetocaloric effect, magnetostriction, thermal cycling, cyclic magnetic fields.

Received: 21.07.2023
Revised: 21.07.2023
Accepted: 26.07.2023

DOI: 10.21883/FTT.2023.09.56253.161