A magnetocaloric effect arising from a ferromagnetic transition in the martensitic state in Heusler alloy of Ni<inf>50</inf>Mn<inf>36</inf>Sb<inf>8</inf>Ga<inf>6</inf>

A magnetocaloric effect arising from a ferromagnetic transition in the martensitic state in Heusler alloy of Ni50Mn36Sb8Ga6

Tian Fanghua Zeng Yuyang Xu Minwei Yang Sen Lu Tao Wang Jieqiong Chang Tieyan Adil Murtaza Zhang Yin Zhou Chao Song Xiaoping · 2015

阅读量：103

期刊名称：

Applied Physics Letters 2015 年 107 卷 1 期

发表日期：

2015.07.06

摘要：

We report a magnetocaloric effect with nearly zero thermal hysteresis in Heusler alloy of Ni50Mn36Sb8Ga6 around room temperature due to a ferromagnetic transition in martensitic state (FTMS). The refrigerant capacity value of this ferromagnetic transition in the vicinity of onset temperature T C M can arrive at 163.8J/kg, much higher than that of first-order magnetically martensitic transition in the same alloy. Such a magnetocaloric effect in FTMS is attributed to a second-order (or a weak first-order) transition from an antiferromagnetic phase with modulated 7M orthorhombic structure to a ferromagnetic phase with modulated 4O orthorhombic structure.