Characterization of the magnetic interactions of multiphase magnetocaloric materials using first-order reversal curve analysis

被引：13
作者：
Franco, V. [1 ,2 ]
Beron, F. [2 ]
Pirota, K. R. [2 ]
Knobel, M. [2 ]
Willard, M. A. [3 ]
机构：
[1] Univ Seville, ICMSE CSIC, Dept Fis Mat Condensada, E-41080 Seville, Spain
[2] Univ Estadual Campinas UNICAMP, Inst Fis Gleb Wataghin, BR-13083859 Sao Paulo, Brazil
[3] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2015年 / 117卷 / 17期
关键词：
REFRIGERATION; MODELS;
D O I：
10.1063/1.4919121
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. (C) 2015 AIP Publishing LLC.
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页数：4
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