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Chin. Phys. B, 2021, Vol. 30(3): 037501    DOI: 10.1088/1674-1056/abc67b
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Critical behavior and effect of Sr substitution in double perovskite Ca2CrSbO6

Yuan-Yuan Jiao(焦媛媛)1,2,3,†, Jian-Ping Sun(孙建平)3, and Qi Cui(崔琦)3,4
1 The State Key Laboratory of Refractories and Metallury, Wuhan University of Science and Technology, Wuhan 430081, China; 2 Faculty of Science, Wuhan University of Science and Technology, Wuhan 430062, China; 3 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 4 University of Chinese Academy of Sciences, Beijing 100049, China
Abstract  The double perovskite Ca2CrSbO6 exhibits a ferromagnetic long-range order below T c = 13 K and a saturation magnetization of 2.35 μ B at 2 K. In this study, the polycrystalline Ca2CrSbO6 is synthesized under high pressure and high temperature, and the critical behavior of the ferromagnetic material as well as the effects of the magnetic behavior due to the isovalent substitution of Sr2 + for Ca2 + is investigated. Also studied are the ferromagnetic criticality of the double perovskite Ca2CrSbO6 at the ferromagnetic transition temperature T c ≈ 12.6 K from the isotherms of magnetization M(H) via an iteration process and the Kouvel-Fisher method. The critical exponents associated with the transition are determined as follows: β = 0.322, γ = 1.241, and δ = 4.84. The magnetization data in the vicinity of T c can be scaled into two universal curves in the plot of $M/\vert \varepsilon \vert ^\beta $ versus $H/\vert \varepsilon \vert ^\beta + \gamma $, where ε =T/T c-1. The obtained β and γ values are consistent with the predicted values from a three-dimensional Ising model. The effects of Sr substitution on the double perovskite Ca2CrSbO6 are taken into consideration. As the Sr content increases, the (Ca2 -xSrx)CrSbO6 polycrystal shows a continuous switch from ferromagnetic to antiferromagnetic behavior.
Keywords:  high-temperature and high-pressure synthesis      ferromagnet      Ca2CrSbO6  
Received:  01 July 2020      Revised:  26 October 2020      Accepted manuscript online:  31 October 2020
PACS:  75.10.-b (General theory and models of magnetic ordering)  
  75.50.Cc (Other ferromagnetic metals and alloys)  
Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305700 and 2018YFA0305800), the National Natural Science Foundation of China (Grant Nos. 11574377, 11888101, 11834016, 11874400, 11904272, and 11704292), and Jiao and Sun were sponsored by the China Postdoctoral Science Foundation and the Postdoctoral Innovative Talent Program.
Corresponding Authors:  Corresponding author. E-mail: jiaoyuanyuan@wust.edu.cn   

Cite this article: 

Yuan-Yuan Jiao(焦媛媛), Jian-Ping Sun(孙建平), and Qi Cui(崔琦) Critical behavior and effect of Sr substitution in double perovskite Ca2CrSbO6 2021 Chin. Phys. B 30 037501

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