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Chin. Phys. B, 2019, Vol. 28(6): 067501    DOI: 10.1088/1674-1056/28/6/067501
Special Issue: Virtual Special Topic — Magnetism and Magnetic Materials
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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)
State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
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).

Keywords:  critical phenomena      magnetocaloric effect      Heusler compound  
Received:  22 February 2019      Revised:  29 March 2019      Accepted manuscript online: 
PACS:  75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))  
  75.20.En (Metals and alloys)  
  75.30.Sg (Magnetocaloric effect, magnetic cooling)  
  75.50.Cc (Other ferromagnetic metals and alloys)  
Fund: 

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.

Corresponding Authors:  Xiao Zhang, Ming Lei     E-mail:  zhangxiaobupt@bupt.edu.cn;mlei@bupt.edu.cn

Cite this article: 

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) Critical behavior and magnetocaloric effect in magnetic Weyl semimetal candidate Co2-xZrSn 2019 Chin. Phys. B 28 067501

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