Observation of giant magnetocaloric effect in EuTi1-xCrxO3

Observation of giant magnetocaloric effect in EuTi1-xCrxO3
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EuTi1-xCrxO3 巨磁热效应的观察

DOI:
10.1016/j.jallcom.2015.07.176
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发表时间:
2015-11
期刊:
J. Alloys Compd
影响因子:
--
通讯作者:
Bao-Gen Shen
Bao-Gen Shen
中科院分区:
其他
文献类型:
--
作者:
Ji-Rong Sun;Ji-Rong Sun;Bao-Gen Shen;Bao-Gen Shen

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研究了EuTi 1−x Cr x O 3 (x= 0,0.02, 0.04, 0.1)化合物的磁性能和磁热效应。纯eutio3的磁基态(AFM)在少量cr掺杂的情况下可以明显改变为FM。在EuTi 1−x Cr x O 3化合物中观察到巨大的可逆MCE和较大的RC。eutio3在5 T磁场变化下的- Δ S M max值可达40.3 J/kg K,特别是在1和2 T磁场变化下,- Δ S M max值分别为12.5和22.5 J/kg K, RC最大值分别为64和127 J/kg, eutio1 - x Cr x O 3体系无磁滞和热滞。因此,巨大的可逆MCE和大的RC使得EuTi - 1 - x Cr × O - 3化合物可以被认为是低温低磁场制冷剂的良好候选材料。
The magnetic properties and magnetocaloric effect in EuTi 1− x Cr x O 3 (x= 0, 0.02, 0.04, 0.1) compounds are investigated. The magnetic ground state (AFM) of pure EuTiO 3 can be significantly changed to be FM with slight Cr-doping. A giant reversible MCE and large RC in EuTi 1− x Cr x O 3 compounds were observed. The value of− Δ S M max reaches to 40.3 J/kg K for EuTiO 3 under the magnetic field change of 5 T. Especially, under the magnetic field changes of 1 and 2 T, the values of− Δ S M max are evaluated to be 12.5 and 22.5 J/Kg K and the maximum values of RC are 64 and 127 J/kg, without magnetic and thermal hysteresis for EuTi 1− x Cr x O 3 system. Therefore, the giant reversible MCE and large RC make the EuTi 1− x Cr x O 3 compounds could be considered as a good candidate material for low-temperature and low-field magnetic refrigerant.
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