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Observation of giant magnetocaloric effect under low magnetic fields in EuTi1-xCoxO3 |
| Qi-Lei Sun(孙启磊)1, Zhao-Jun Mo(莫兆军)2, Jun Shen(沈俊)3, Yu-Jin Li(黎玉进)1, Lan Li(李兰)2, Jun-Kai Zhang(张君凯)2, Guo-Dong Liu(刘国栋)1, Cheng-Chun Tang(唐成春)1, Fan-Bin Meng(孟凡斌)1 |
1. School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China;
2. Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education of Ministry of Education, Key Laboratory for Optoelectronic Materials and Devices of Tianjin, Institute of Material Physics, School of Material Science and Engineering, Tianjin University of Technology, Tianjin 300191, China;
3. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract The magnetic properties and magnetocaloric effect (MCE) in EuTi1-xCoxO3 (x=0, 0.025, 0.05, 0.075, 0.1) compounds have been investigated. When the Ti4+ ions were substituted by Co2+ ions, the delicate balance was changed between antiferromagnetic (AFM) and ferromagnetic (FM) phases in the EuTiO3 compound. In EuTi1-xCoxO3 system, a giant reversible MCE and large refrigerant capacity (RC) were observed without hysteresis. The values of-△ SMmax were evaluated to be around 10 J·kg-1·K-1 for EuTi0.95Co0.05O3 under a magnetic field change of 10 kOe. The giant reversible MCE and large RC suggests that EuTi1-xCoxO3 series could be considered as good candidate materials for low-temperature and low-field magnetic refrigerant.
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Received: 02 May 2017
Revised: 31 July 2017
Accepted manuscript online:
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PACS:
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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65.40.gd
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(Entropy)
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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 Natural Science Foundation of China (Grant Nos. 11504266, 51271192, 51322605, and 51371075) and the Natural Science Foundation of Tianjin, China (Grant No. 17JCQNJC02300). |
Corresponding Authors:
Fan-Bin Meng
E-mail: fanbinmeng@126.com
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Cite this article:
Qi-Lei Sun(孙启磊), Zhao-Jun Mo(莫兆军), Jun Shen(沈俊), Yu-Jin Li(黎玉进), Lan Li(李兰), Jun-Kai Zhang(张君凯), Guo-Dong Liu(刘国栋), Cheng-Chun Tang(唐成春), Fan-Bin Meng(孟凡斌) Observation of giant magnetocaloric effect under low magnetic fields in EuTi1-xCoxO3 2017 Chin. Phys. B 26 117501
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