Reversibility of magnetostructural transition and associated magnetocaloric effect in Ni–Mn–In–Co
Reversibility of magnetostructural transition and associated magnetocaloric effect in Ni–Mn–In–Co
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DOI：
10.1063/1.2981210
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发表时间：
2008-09
影响因子：
4
通讯作者：
Jian Liu;N. Scheerbaum;J. Lyubina;O. Gutfleisch
中科院分区：
文献类型：
--
作者：
Jian Liu;N. Scheerbaum;J. Lyubina;O. Gutfleisch
通过分析磁场循环下的等温磁化曲线，研究了Ni-Mn-In-Co系块体样品和快淬薄带磁结构转变的可逆性。热/磁致马氏体相变的滞后对磁结构相变的可逆性起着重要作用。在磁滞18K较大的薄带中，去除磁场后存在残余磁场诱导的奥氏体相变，而在块体样品中，由于8K的磁滞回线相对较小，磁结构转变在中等温度下是可逆的。此外，由于发生了不可逆的磁结构转变，磁热效应强烈依赖于样品的历史，特别是对薄带而言。
By analyzing isothermal magnetization curves under magnetic field cycling, the reversibility of the magnetostructural transition was investigated in Ni–Mn–In–Co in form of bulk sample and melt-spun ribbons. The hysteresis of thermally/magnetically induced martensitic transformation plays an important role in the reversibility of the magnetostructural transition. In ribbons with a large hysteresis of 18K, residual field-induced austenite is present after removing the magnetic field, while, in the bulk sample, the magnetostructural transition is reversible at moderate temperatures due to a relatively smaller hysteresis of 8K. Additionally, the magnetocaloric effect strongly depends on the sample history due to the occurrence of the irreversible magnetostructural transition, especially for the ribbons.