Low-field induced giant magnetocaloric effect in EuTi1-xNixO3 (x = 0.05, 0.1) compounds

•When a few of Ni ions replace Ti ions, the FM exchange will be increased.•The increased of the FM exchange can effectively improve the values of −ΔSM under low field changes.•Under field changes of 1 T, the value of −ΔSMmax is 13.7 J/kg K and the RC is 53.4 J/kg for EuTi0.9Ni0.1O3, respectively.•Th...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-05, Vol.477, p.258-263
Main Authors: Mo, ZhaoJun, Jiang, WenHao, Zhao, Yun, Hao, ZhiHong, Zheng, ZheXuan, Zhang, Wei, Li, Lan, Shen, Jun
Format: Article
Language:English
Subjects:
Entropy
Helium
Liquid helium
Magnetic entropy change
Magnetic transitions
Magnetocaloric effect
Refrigerant capacity
Refrigeration
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Summary:•When a few of Ni ions replace Ti ions, the FM exchange will be increased.•The increased of the FM exchange can effectively improve the values of −ΔSM under low field changes.•Under field changes of 1 T, the value of −ΔSMmax is 13.7 J/kg K and the RC is 53.4 J/kg for EuTi0.9Ni0.1O3, respectively.•The maximum value of ΔTad is 4.1 K for EuTi0.9Ni0.1O3 compound as magnetic field changes 1 T. The FM exchange is gradually enhanced in the EuTi1-xNixO3 (x = 0.05, 0.1) compounds. There are two successive magnetic transitions around liquid helium temperature, and exhibit a giant reversible magnetocaloric effect. The maximum values of magnetic entropy change are 41.9 and 45.5 J/kg K, and the refrigerating capacity were evaluated to be 336.5 and 359.5 J/kg for a field change of 5 T. Especially, for a field change of 1 T, the maximum value of magnetic entropy change is 13.7 J/kg K, the refrigerating capacity reach to 53.4 J/kg, and adiabatic temperature change is 4.1 K for EuTi0.9Ni0.1O3, respectively.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.01.068