Origin of temperature hysteresis of the magnetic transition in martensitic phase of Ni51.9Mn27Ga21.1 alloy
2018
Abstract
The study reports on structural and magnetic measurements undertaken to explore the reasons for hysteretic behavior of the magnetic transition observed in Ni51.9Mn27Ga21.1 alloy. Two different martensitic structures, the seven-layered modulated (14M) martensite and the non-modulated (2M) one, were found to form on cooling from austenitic phase while on heating from room temperature practically single 2M phase is observed.
Magnetic susceptibility measurements confirmed that temperature hysteresis of the magnetic transition achieves 10 K due to different sequences of martensitic transformations the Ni51.9Mn27Ga21.1 alloy passes through on cooling and heating. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.
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