中国物理B ›› 2019, Vol. 28 ›› Issue (6): 67501-067501.doi: 10.1088/1674-1056/28/6/067501

所属专题: Virtual Special Topic — Magnetism and Magnetic Materials

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

Critical behavior and magnetocaloric effect in magnetic Weyl semimetal candidate Co2-xZrSn

Tianlin Yu(于天麟), Xiaoyun Yu(余骁昀), En Yang(杨恩), Chang Sun(孙畅), Xiao Zhang(张晓), Ming Lei(雷鸣)   

  1. State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2019-02-22 修回日期:2019-03-29 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: Xiao Zhang, Ming Lei E-mail:zhangxiaobupt@bupt.edu.cn;mlei@bupt.edu.cn
  • 基金资助:

    Project supported by the Fundamental Research Funds for the Central Universities (Grant No. 2017RC20) and the Research Innovation Fund for College Students of Beijing University of Posts and Telecommunications.

Critical behavior and magnetocaloric effect in magnetic Weyl semimetal candidate Co2-xZrSn

Tianlin Yu(于天麟), Xiaoyun Yu(余骁昀), En Yang(杨恩), Chang Sun(孙畅), Xiao Zhang(张晓), Ming Lei(雷鸣)   

  1. State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2019-02-22 Revised:2019-03-29 Online:2019-06-05 Published:2019-06-05
  • Contact: Xiao Zhang, Ming Lei E-mail:zhangxiaobupt@bupt.edu.cn;mlei@bupt.edu.cn
  • Supported by:

    Project supported by the Fundamental Research Funds for the Central Universities (Grant No. 2017RC20) and the Research Innovation Fund for College Students of Beijing University of Posts and Telecommunications.

摘要:

We investigate the critical exponents and magnetocaloric effect of Co2-xZrSn polycrystal. The Co2-xZrSn undergoes a second-order ferromagnetism phase transition around the Curie temperature of Tc~280 K. The critical behavior in the vicinity of the magnetic phase transition has been investigated by using modified Arrott plot and Kouvel-Fisher methods. The obtained critical exponents, β, γ, and δ can be well described by the scaling theory. The determined exponents of Co2-xZrSn obey the mean-field model with a long-range magnetic interaction. In addition, the maximum magnetic entropy change -ΔSMmax of Co2-xZrSn is about 0.57 J·kg-1·K-1 and the relative cooling power (RCP) is 14.68 J·kg-1 at 50 kOe (1 Oe=79.5775 A·m-1).

关键词: critical phenomena, magnetocaloric effect, Heusler compound

Abstract:

We investigate the critical exponents and magnetocaloric effect of Co2-xZrSn polycrystal. The Co2-xZrSn undergoes a second-order ferromagnetism phase transition around the Curie temperature of Tc~280 K. The critical behavior in the vicinity of the magnetic phase transition has been investigated by using modified Arrott plot and Kouvel-Fisher methods. The obtained critical exponents, β, γ, and δ can be well described by the scaling theory. The determined exponents of Co2-xZrSn obey the mean-field model with a long-range magnetic interaction. In addition, the maximum magnetic entropy change -ΔSMmax of Co2-xZrSn is about 0.57 J·kg-1·K-1 and the relative cooling power (RCP) is 14.68 J·kg-1 at 50 kOe (1 Oe=79.5775 A·m-1).

Key words: critical phenomena, magnetocaloric effect, Heusler compound

中图分类号:  (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))

  • 75.40.Cx
75.20.En (Metals and alloys) 75.30.Sg (Magnetocaloric effect, magnetic cooling) 75.50.Cc (Other ferromagnetic metals and alloys)