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Mn<sub>1.3</sub>Fe<sub>0.7</sub>P<sub>0.45</sub>Si<sub>0.55</sub>化合物的热滞与磁热效应 被引量:1

Thermal Hysteresis and Magnetocaloric Effect of Mn<sub>1.3</sub>Fe<sub>0.7</sub>P<sub>0.45</sub>Si<sub>0.55</sub> Compound
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摘要 用机械合金化方法制备出了Mn1.3Fe0.7P0.45Si0.55化合物。研究了Mn1.3Fe0.7P0.45Si0.55化合物的结构、磁性和磁热效应。结果表明,该化合物形成了Fe2P型六角结构,空间群为P62m,化合物中存在少量的(Mn,Fe)3Si相。在居里点附近,随着温度的提高化合物发生了由铁磁到顺磁的一级相变过程。化合物的Curie温度为315K,热滞为4K。在1.5T磁场变化下,化合物的最大等温磁熵变为10.3J/(kg.K)。低成本的原料、简单的制备工艺、合适的Curie温度、较小的热滞和较大的磁熵变,使得Mn1.3Fe0.7P0.45Si0.55化合物有希望成为一种可应用的新型室温磁制冷材料。 用机械合金化方法制备出了Mn1.3Fe0.7P0.45Si0.55化合物。研究了Mn1.3Fe0.7P0.45Si0.55化合物的结构、磁性和磁热效应。结果表明,该化合物形成了Fe2P型六角结构,空间群为P62m,化合物中存在少量的(Mn,Fe)3Si相。在居里点附近,随着温度的提高化合物发生了由铁磁到顺磁的一级相变过程。化合物的Curie温度为315K,热滞为4K。在1.5T磁场变化下,化合物的最大等温磁熵变为10.3J/(kg.K)。低成本的原料、简单的制备工艺、合适的Curie温度、较小的热滞和较大的磁熵变,使得Mn1.3Fe0.7P0.45Si0.55化合物有希望成为一种可应用的新型室温磁制冷材料。
出处 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2012年第S2期384-387,共4页 Rare Metal Materials and Engineering
基金 国家自然科学基金(50961010) 内蒙古自然科学重点项目(20080404DZ01)
关键词 过渡金属化合物 热滞 磁热效应 一级相变 transition metal compounds thermal hysteresis magnetocaloric effect first-order phase transition
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参考文献16

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共引文献4

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