Magnetocaloric effect study of SrFe0.8Co0.2O3 single crystal prepared under high pressure

doi:10.1088/1674-1056/24/5/050701

中国物理B ›› 2015, Vol. 24 ›› Issue (5): 50701-050701.doi: 10.1088/1674-1056/24/5/050701

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Magnetocaloric effect study of SrFe_0.8Co_0.2O₃ single crystal prepared under high pressure

夏海亮^{a b}, 秦晓梅^a, 杨俊叶^b, 殷云宇^b, 戴建洪^b, 石旺舟^a, 龙有文^{b c}

a Department of Physics, Shanghai Normal University, Shanghai 200234, China;
b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Collaborative Innovation Center of Quantum Matter, Beijing 100190, China

收稿日期:2015-01-29 修回日期:2015-03-04 出版日期:2015-05-05 发布日期:2015-05-05
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2014CB921500) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07030300).

Magnetocaloric effect study of SrFe_0.8Co_0.2O₃ single crystal prepared under high pressure

Xia Hai-Liang (夏海亮)^{a b}, Qin Xiao-Mei (秦晓梅)^a, Yang Jun-Ye (杨俊叶)^b, Yin Yun-Yu (殷云宇)^b, Dai Jian-Hong (戴建洪)^b, Shi Wang-Zhou (石旺舟)^a, Long You-Wen (龙有文)^{b c}

a Department of Physics, Shanghai Normal University, Shanghai 200234, China;
b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Collaborative Innovation Center of Quantum Matter, Beijing 100190, China

Received:2015-01-29 Revised:2015-03-04 Online:2015-05-05 Published:2015-05-05
Contact: Qin Xiao-Mei, Long You-Wen E-mail:xmqin@shnu.edu.cn;ywlong@iphy.ac.cn
About author:07.35.+k; 75.30.Sg; 75.30.Kz
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2014CB921500) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07030300).

摘要/Abstract

摘要：

A high-quality SrFe_0.8Co_0.2O₃ single crystal is prepared by combining floating-zone and high-pressure treatment methods. Its Magnetocaloric effect is investigated by magnetic measurements. A paramagnetism-to-ferromagnetism transition is found at about 270 K and this transition is a second-order one in nature as confirmed by Arrott plots. The saturated moment obtained at 2 K and 7 T is 3.63 μ_B/f.u. The maximal value of magnetic entropy change measured at 5 T is about 4.0 J·kg^-1·K^-1. The full wide at half maximum for a magnetic entropy change peak observed in SrFe_0.8Co_0.2O₃ is considerably large. As a consequence, the relative cooling power value of SrFe_0.8Co_0.2O₃ obtained at 5 T is 331 J/kg, which is greatly higher than those observed in other perovskite oxides. The present work therefore provides a promising candidate for magnetic refrigeration near room temperature.

关键词: high pressure synthesis, magnetocaloric effect, ferromagnetic phase transition

Abstract:

Key words: high pressure synthesis, magnetocaloric effect, ferromagnetic phase transition

中图分类号: (High-pressure apparatus; shock tubes; diamond anvil cells)

07.35.+k

75.30.Sg (Magnetocaloric effect, magnetic cooling) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

夏海亮, 秦晓梅, 杨俊叶, 殷云宇, 戴建洪, 石旺舟, 龙有文. Magnetocaloric effect study of SrFe_0.8Co_0.2O₃ single crystal prepared under high pressure[J]. 中国物理B, 2015, 24(5): 50701-050701.

Xia Hai-Liang (夏海亮), Qin Xiao-Mei (秦晓梅), Yang Jun-Ye (杨俊叶), Yin Yun-Yu (殷云宇), Dai Jian-Hong (戴建洪), Shi Wang-Zhou (石旺舟), Long You-Wen (龙有文). Magnetocaloric effect study of SrFe_0.8Co_0.2O₃ single crystal prepared under high pressure[J]. Chin. Phys. B, 2015, 24(5): 50701-050701.

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Magnetocaloric effect study of SrFe_0.8Co_0.2O₃ single crystal prepared under high pressure

Magnetocaloric effect study of SrFe_0.8Co_0.2O₃ single crystal prepared under high pressure

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