个人信息:
时阳光
招生学科专业:
物理学 -- 【招收硕士研究生】 -- 理学院
联系方式:QQ:446585448 学位:理学博士学位

个人信息: Personal information

学历:南京大学 毕业院校:南京大学 所在单位:理学院 办公地点:理学院435

Magnetocaloric effect in Nd(Co0.8Fe0.2)(2) Laves compound with wide operating temperature

点击次数: 所属单位:理学院 发表刊物:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 关键字:Cubic Laves compound Magnetocaloric effect Transition order 摘要:The magnetocaloric effect (MCE) and transition order in Nd(Co0.8Fe0.2)(2) Laves phase compound were studied by dc magnetization measurement. In order to make the inexpensive NdCo2 Laves phase compound for room-temperature magnetic refrigeration possible, the Curie temperature of the NdCo2 (similar to 100 K) was tuned to 263 K with 20 at.% of Fe substituting for Co. An entropy change of 1.66 J/kg K was obtained in Nd(Co0.8Fe0.2)(2) at 265 K under an external magnetic field change of 30 kOe. Meanwhile, a wide operating temperature range of 102 K for MCE and a large refrigerant capacity of 121.6 J/kg at an external field change of 30 kOe were observed. Specially, at an external field change of 20 kOe, the operating temperature of Nd(Co0.8Fe0.2)(2) (81 K) is even twice wider than that of Gd (39 K). To confirm the transition order of the compound, Banerjee criterion as well as the universal scaling of the magnetocaloric effects were employed. These two criteria agree well with each other, indicating a second-order transition in Nd(Co0.8Fe0.2)(2). (C) 2018 Elsevier B.V. All rights reserved. ISSN号:0304-8853 是否译文: 发表时间:2018-08-15 第一作者:时阳光 通讯作者:时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光,时阳光 其他作者:Zheng, W. G.,Cui,Y,Chen, F. H.,施大宁