Giant low-field magnetocaloric effect in EuTi_(1-x)Nb_xO_3(x = 0.05, 0.1, 0.15, and 0.2) compounds |
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| Authors: | Wen-Hao Jiang Zhao-Jun Mo Jia-Wei Luo Zhe-Xuan Zheng Qiu-Jie Lu Guo-Dong Liu Jun Shen Lan Li |
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| Affiliation: | (School of Material Science and Engineering,Institute of Material Physics,Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education,Key Laboratory for Optoelectronic Materials and Devices of Tianjin,Tianjin University of Technology,Tianjin 300191,China;Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Material Science and Engineering,Hebei University of Technology,Tianjin 300401,China) |
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| Abstract: | The magnetic properties and magnetocaloric effect（MCE）of EuTi1-xNbxO3（x=0.05,0.1,0.15,and 0.2）compounds are investigated.Owing to electronic doping,parts of Ti ions are replaced by Nb ions,the lattice constant increases and a small number of Ti4+（3d0）ions change into Ti3+（3d1）.It is the ferromagnetism state that is dominant in the derivative balance.The values of the maximum magnetic entropy change(-?SMmax)are 10.3 J/kg·K,9.6 J/kg·K,13.1 J/kg·K,and 11.9 J/kg·K for EuTi1-xNbxO3（x=0.05,0.1,0.15,and 0.2）compounds and the values of refrigeration capacity are 36,33,86,and 80 J/kg as magnetic field changes in a range of 0 T–1 T.The EuTi1-xNbxO3（x=0.05,0.1,0.15,and 0.2）compounds with giant reversible MCE are considered as a good candidate for magnetic refrigerant working at lowtemperature and low-field. |
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| Keywords: | magnetocaloric effect magnetic entropy change magnetic phase transformation |
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