Influence of gadolinium and dysprosium substitution on magnetic properties and magnetocaloric effect of Fe78-xRExSi4Nb5B12Cu1 amorphous alloys
Influence of gadolinium and dysprosium substitution on magnetic properties and magnetocaloric effect of Fe78-xRExSi4Nb5B12Cu1 amorphous alloys
复制标题
钆、镝替代对Fe78-xRExSi4Nb5B12Cu1非晶合金磁性能和磁热效应的影响
DOI：
10.1016/j.jre.2020.02.005
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发表时间：
2020-12-01
影响因子：
4.9
通讯作者：
Ramanujan, R., V
中科院分区：
文献类型：
--
作者：
Zhao, Lizhong;Tian, Huacun;Ramanujan, R., V
为了研究重稀土(Gd，Dy)掺杂对Fe78-xRExSi4Nb5B12Cu1(RE=Gd，Dy)非晶薄带超精细结构、磁性能和磁热效应的影响，采用熔体快淬法制备了不同稀土含量的Fe78-xRExSi4Nb5B12Cu1(RE=Gd，Dy)非晶薄带。稀土替代合金的居里温度、超精细场和Fe原子的磁矩最初增加到1at%RE含量，然后随着RE含量增加到10at%单调下降。合金的磁熵变(-ΔS-M)和制冷量(Rc)与稀土含量的关系也表现出相同的趋势。用1at%Gd和Dy取代的合金的RCAREA值与最近报道的铁基金属玻璃的RCAREA值相似，但RC值比Gd5Ge1.9Si2Fe0.1的RC值有所提高。增强的S-M和RC值、可忽略的矫顽力和磁滞通常使这些Fe78-xRExSi4Nb5B12Cu1非晶合金成为高温磁制冷的低成本候选者。(三)2020年中国稀土学会。爱思唯尔出版，版权所有。
Amorphous Fe78-xRExSi4Nb5B12Cu1 (RE = Gd, Dy) ribbons with different RE contents were prepared by melt spinning to investigate the effect of heavy rare earth (Gd, Dy) substitution on the hyperfine structure, magnetic properties and magnetocaloric effect. The Curie temperature of RE substituted alloys, hyperfine field and magnetic moments of Fe atoms initially increase up to 1 at% RE content and then decrease monotonously for increasing RE content up to 10 at%. The dependence of magnetic entropy change (-Delta S-M) and refrigeration capacity (RC) of the alloys on RE contents displays the same tendency. The RCAREA values of the alloys substituted with 1 at% Gd and Dy are similar to those of recently reported Fe-based metallic glasses with enhanced RC values compared with those of Gd5Ge1.9Si2Fe0.1. Enhanced -Delta S-M and RC values, negligible coercive force and hysteresis commonly make these Fe78-xRExSi4Nb5B12Cu1 amorphous alloys as low-cost candidates for high-temperature magnetic refrigeration. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.