Characterization of the magnetic interactions of multiphase magnetocaloric materials using first-order reversal curve analysis
Characterization of the magnetic interactions of multiphase magnetocaloric materials using first-order reversal curve analysis
复制标题
使用一阶反转曲线分析表征多相磁热材料的磁相互作用
DOI：
10.1063/1.4919121
复制
发表时间：
2015
影响因子：
3.2
通讯作者：
M. Willard
中科院分区：
文献类型：
--
作者：
V. Franco;F. Béron;K. Pirota;M. Knobel;M. Willard
为了了解材料的磁热响应，分析材料中不同相之间的相互作用是很重要的。最近的模型分析了这些相互作用对复合材料磁热响应的影响，提供了与实验结果一致的相互作用场的估定值。本文分析了磁化一阶反转曲线（FORC）法在多大程度上可以用来计算这些相互作用。结果表明，使用这些技术探索的不同场范围（对于FORC在滞回区域内；对于磁热效应接近磁饱和）产生的相互作用场值在数量级上存在差异，FORC对较低的相互作用场值敏感，而磁热分析则对较大的相互作用值敏感。
In order to understand the magnetocaloric response of materials, it is important to analyze the interactions between the different phases present in them. Recent models have analyzed the influence of these interactions on the magnetocaloric response of composites, providing an estimate value of the interaction field that is consistent with experimental results. This paper analyzes to which extent magnetization first-order reversal curve (FORC) method can be used to calculate these interactions. It is shown that the different field ranges that are explored using these techniques (inside the hysteretic region for FORC; close to magnetic saturation for magnetocaloric effect) produce interaction field values that differ in order of magnitude, with FORC being sensitive to the lower values of the interaction field and magnetocaloric analysis accounting for the larger interactions.