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Magnetocaloric effect study of SrFe0.8Co0.2O3 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 |
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Abstract A high-quality SrFe0.8Co0.2O3 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 μB/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 SrFe0.8Co0.2O3 is considerably large. As a consequence, the relative cooling power value of SrFe0.8Co0.2O3 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.
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Received: 29 January 2015
Revised: 04 March 2015
Accepted manuscript online:
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PACS:
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07.35.+k
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(High-pressure apparatus; shock tubes; diamond anvil cells)
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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75.30.Kz
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(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
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| Fund: 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). |
Corresponding Authors:
Qin Xiao-Mei, Long You-Wen
E-mail: xmqin@shnu.edu.cn;ywlong@iphy.ac.cn
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| About author: 07.35.+k; 75.30.Sg; 75.30.Kz |
Cite this article:
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 SrFe0.8Co0.2O3 single crystal prepared under high pressure 2015 Chin. Phys. B 24 050701
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