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Best Practices in Evaluation of the Magnetocaloric Effect from Bulk Magnetization Measurements
Journal of Magnetism and Magnetic Materials ( IF 2.7 ) Pub Date : 2018-07-01 , DOI: 10.1016/j.jmmm.2018.03.020
H. Neves Bez , H. Yibole , A. Pathak , Y. Mudryk , V.K. Pecharsky

Abstract Conventional magnetometry is irreplaceable in evaluating bulk magnetization of materials over broad temperature and field ranges. The technique is also effective in quantifying hysteresis that may be associated with magnetic and structural phase transitions that occur during the magnetizing/demagnetizing cycling, and the derived magnetic field-induced isothermal entropy change – one of the most important properties in the field of magnetocalorics. Both systematic and random errors present during the measurements of magnetization, however, may lead to erroneous conclusions. Using two well-known materials – elemental Gd and intermetallic Gd5Si2Ge2 as examples, we consider best practices in performing reliable and rapid magnetization measurements for proper characterization of magnetocaloric properties.

中文翻译:

从体磁化测量评估磁热效应的最佳实践

摘要 传统磁力计在评估材料在较宽的温度和磁场范围内的体磁化强度方面是不可替代的。该技术还可有效量化磁滞现象,磁滞现象可能与磁化/退磁循环期间发生的磁性和结构相变以及衍生的磁场诱导的等温熵变有关——这是磁热学领域最重要的特性之一。然而,在磁化测量期间存在的系统误差和随机误差都可能导致错误的结论。使用两种众所周知的材料 - 元素 Gd 和金属间 Gd5Si2Ge2 作为示例,我们考虑了执行可靠和快速磁化测量以正确表征磁热特性的最佳实践。
更新日期:2018-07-01
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