【摘要】 本文对超大磁阻材料La2 /3Ca1/3MnO3的巨磁熵效应进行了研究 .通过测量不同磁场下的磁化 温度曲线 ,发现伴随铁磁 顺磁相变有一个大的磁熵变化 ,这个结果表明钙钛矿锰氧化物可以作为磁致冷技术中的工作物质 .更多还原

【Abstract】 We present a study of large magnetic entropy change in the colossal magnetoresistance material La\-\{2/3\}Ca\-\{1/3\}MnO\-3. From the measurement of temperature dependence of magnetization under various magnetic fields, We have discovered a large magnetic entropy change associated with the ferromagnetic paramagnetic transition. This result suggests that perovskite manganites are suitable candidates as working substances in magnetic refrigeration technology.更多还原