Low-field magnetocaloric effect in Pr0.5Sr0.5MnO3
Low-field magnetocaloric effect in Pr0.5Sr0.5MnO3
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DOI：
10.1209/epl/i2000-00478-8
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发表时间：
2000-12
期刊：
影响因子：
1.8
通讯作者：
P. Chen;Youwei Du;G.Ni
中科院分区：
文献类型：
--
作者：
P. Chen;Youwei Du;G.Ni
研究了多晶Pr 1 − xSrxMnO 3（x = 0.3，0.4，0.5）的磁热效应。在1 T的低磁场下，Pr_（0.5）Sr_（0.5）MnO_3在电荷有序态转变温度（161 K）下具有较大的磁熵变（7.1 J/kg K）.其物理机制与磁场引起的磁性、电子和结构相变（从反铁磁电荷有序态到铁磁电荷无序态）温度下的剧烈磁化变化有关。
The magnetocaloric effect in polycrystalline of Pr1 − xSrxMnO3 (x = 0.3, 0.4, 0.5) was investigated. A large magnetic entropy change (7.1 J/kg K) is discovered in Pr0.5Sr0.5MnO3 under a low magnetic field of 1 T at charge-ordered state transition temperature (161 K). The physical mechanism is related to a drastic magnetization change at a temperature where the field-induced magnetic, electron and structural phase transitions occur (from antiferromagnetic charge-ordered state to ferromagnetic charge-disordered state).