Observation of giant magnetocaloric effect under low magnetic fields in EuTi1-xCoxO3

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 Ti^4＋ ions were substituted by Co2＋ions, the delicate balance was changed between antiferromagnetic（AFM） and ferromagnetic（FM） phases in the EuTiO3 compou...

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Published in中国物理B：英文版 Vol. 26; no. 11; pp. 475 - 480
Main Author 孙启磊;莫兆军;沈俊;黎玉进;李兰;张君凯;刘国栋;唐成春;孟凡斌
Format Journal Article
LanguageEnglish
Published 01.11.2017
Subjects
MCE
was
低磁场
制冷剂
化合物
巨磁热效应
磁场变化
钢筋混凝土
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/26/11/117501

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Summary: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 Ti^4＋ 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 -△SM^max 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.
Bibliography: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 Ti^4＋ 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 -△SM^max 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.
magnetocaloric effect magnetic entropy change magnetic phase transformation
11-5639/O4
Qi-Lei Sun1, Zhao-Jun Mo2, Jun Shen3, Yu-Jin Li1, Lan Li2, Jun-Kai Zhang2, Guo-Dong Liu1, Cheng-Chun Tang1,Fan-Bin Meng1（ 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, Bcijing 100190, China）
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/11/117501