（Mn，Fe）As中直接观测到的磁热效应的历史依赖性
History dependence of directly observed magnetocaloric effects in (Mn, Fe)As
摘要：
本文采用量热法研究了在扫描磁场中Mn_（0.985）Fe_（0.015）As的磁热效应随热磁历史的变化。我们研究的磁化历史，一个“巨大的”MCE已被报道时，间接推断通过麦克斯韦关系。我们在直接量热测量中没有观察到巨大效应。我们进一步研究了混合相态对MCE的影响，并表明一阶贡献与相分数呈线性关系。这验证了各种相分数为基础的方法，以消除巨大的峰值异常麦克斯韦为基础的估计。
英文摘要：
We use a calorimetric technique operating in sweeping magnetic field to study the thermomagnetic history- dependence of the magnetocaloric effect (MCE) in Mn0.985Fe0.015As. We study the magnetization history for which a "colossal" MCE has been reported when inferred indirectly via a Maxwell relation. We observe no colossal effect in the direct calorimetric measurement. We further examine the impact of mixed-phase state on the MCE and show that the first order contribution scales linearly with the phase fraction. This validates various phase-fraction based methods developed to remove the colossal peak anomaly from Maxwell-based estimates.
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