LARGE MAGNETIC ENTROPY CHANGE NEAR CHARGE-ORDERED TRANSITION TEMPERATURE IN PEROVSKITE-TYPE MANGANITE

• 来源期刊: 中国物理(英文版)
• 学科: 物理学
• 关键词: magnetic entropy change charge-ordered field-induced phase transition
• 年，卷（期）: 2001,（10）
• 页码范围: 970-973
• 页数: 4页
• 分类号: O4
• 语种: 英文

摘要

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 IT 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).