中国物理B ›› 2017, Vol. 26 ›› Issue (3): 37502-037502.doi: 10.1088/1674-1056/26/3/037502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetic properties and magnetocaloric effect of the Cr-based spinel sulfides Co1-xCuxCr2S4

Xiao-Chao Zheng(郑小超), Xi-Yang Li(李西阳), Lun-Hua He(何伦华), Shao-Ying Zhang(张绍英), Ming-Hua Tang(唐明华), Fang-Wei Wang(王芳卫)   

  1. 1 School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Dongguan Branch, Institute of High Energy Physics, Chinese Academy of Sciences, Dongguan 523803, China;
    4 Key Laboratory of Key Film Materials and Application for Equipments(Hunan Province), School of Material Sciences and Engineering, Xiangtan University, Xiangtan 411105, China
  • 收稿日期:2017-01-12 修回日期:2017-01-23 出版日期:2017-03-05 发布日期:2017-03-05
  • 通讯作者: Fang-Wei Wang, Ming-Hua Tang E-mail:fwwang@iphy.ac.cn;mhtang@xtu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274369, 51472210, and 11675255).

Magnetic properties and magnetocaloric effect of the Cr-based spinel sulfides Co1-xCuxCr2S4

Xiao-Chao Zheng(郑小超)1,2, Xi-Yang Li(李西阳)2, Lun-Hua He(何伦华)2,3, Shao-Ying Zhang(张绍英)2,3, Ming-Hua Tang(唐明华)4, Fang-Wei Wang(王芳卫)2,3   

  1. 1 School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Dongguan Branch, Institute of High Energy Physics, Chinese Academy of Sciences, Dongguan 523803, China;
    4 Key Laboratory of Key Film Materials and Application for Equipments(Hunan Province), School of Material Sciences and Engineering, Xiangtan University, Xiangtan 411105, China
  • Received:2017-01-12 Revised:2017-01-23 Online:2017-03-05 Published:2017-03-05
  • Contact: Fang-Wei Wang, Ming-Hua Tang E-mail:fwwang@iphy.ac.cn;mhtang@xtu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274369, 51472210, and 11675255).

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摘要：

Crystallographic structure, magnetic properties, and magnetic entropy change of the Cr-based spinel sulfides Co1-xCuxCr2S4 (x=0-0.8) have been investigated. All these compounds crystallize into the cubic spinel structure, the Cu substitution shrinks linearly the lattice constant at a ratio of 0.0223 Å per Cu atom in the unit cell, and enhances linearly the Curie temperature and the spontaneous magnetization at the rates of 18 K and 0.33 μB/f.u. per Cu atom in the unit cell, respectively. All these compounds show a typical behavior of second order magnetic transition, and a room temperature magnetic entropy change of 2.57 J/kg·K is achieved for Co0.4Cu0.6Cr2S4.

关键词: chalcospinels, magnetocaloric effect, magnetism, crystal structure

Abstract:

Crystallographic structure, magnetic properties, and magnetic entropy change of the Cr-based spinel sulfides Co1-xCuxCr2S4 (x=0-0.8) have been investigated. All these compounds crystallize into the cubic spinel structure, the Cu substitution shrinks linearly the lattice constant at a ratio of 0.0223 Å per Cu atom in the unit cell, and enhances linearly the Curie temperature and the spontaneous magnetization at the rates of 18 K and 0.33 μB/f.u. per Cu atom in the unit cell, respectively. All these compounds show a typical behavior of second order magnetic transition, and a room temperature magnetic entropy change of 2.57 J/kg·K is achieved for Co0.4Cu0.6Cr2S4.

Key words: chalcospinels, magnetocaloric effect, magnetism, crystal structure

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.-y (Studies of specific magnetic materials)