LARGE MAGNETIC ENTROPY CHANGE NEAR CHARGE-ORDERED TRANSITION TEMPERATURE IN PEROVSKITE-TYPE MANGANITE
Chen Peng (陈鹏)ab, Du You-wei (都有为)b
a Department of Physics, South-West Normal University, Chongqing 400715, China; b State Key Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
Abstract The magnetocaloric effect in polycrystalline of Pr1-xSrxMnO3 (x=0.33, 0.43, 0.50) has been investigated. A large magnetic entropy change (7.1J/kgK) was discovered in Pr0.5Sr0.5MnO3 under a low magnetic field of 1T at charge-ordered state transition temperature (161K). 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 the antiferromagnetic charge-ordered state to the ferromagnetic charge-disordered state).
Received: 04 January 2001
Revised: 30 March 2001
Accepted manuscript online:
(Crystallographic aspects of phase transformations; pressure effects)
Fund: Project supported by the State Key Development Program for Basic Research of China (Grant No. 1999064508) and by the Major Program of the National Natural Science Foundation of China (Grant No. 19890310).
Cite this article:
Chen Peng (陈鹏), Du You-wei (都有为) LARGE MAGNETIC ENTROPY CHANGE NEAR CHARGE-ORDERED TRANSITION TEMPERATURE IN PEROVSKITE-TYPE MANGANITE 2001 Chinese Physics 10 970
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