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| (La0.55Gd0.15)Sr0.3MnO3中的磁热效应 | |
| 引用本文： | 郭焕银,刘宁,童伟.(La0.55Gd0.15)Sr0.3MnO3中的磁热效应[J].低温物理学报,2003,25(1):46-50. |
| 作者姓名： | 郭焕银 刘宁 童伟 |
| 作者单位： | 1. 宿州师范专科学校,宿州,234000 2. 宿州师范专科学校,宿州,234000;中国科学技术大学结构分析重点实验室,合肥,230026 3. 中国科学技术大学结构分析重点实验室,合肥,230026 |
| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研项目，19934003，，， |
| 摘 要： | 本对A位掺杂的超大磁阻材料（La0.55Gd0.15)Sr0.3MnO3的磁热效应进行了研究，通过不同温度下的等温磁化（M-H）曲线的测量和计算，发现伴随铁磁-顺磁相变出现大的磁热效应，额外的磁性交换作用将导致额外的磁熵变化。 |
| 关 键 词： | （La0.55Gd0.15）Sr0.3MnO3 超大磁组 铁磁－顺磁相变 磁热效应 磁熵变化 |
| 修稿时间： | 2002年10月25 |
MAGNETOCALORIC EFFECT OF (La0.55Gd0.15)Sr0.3MnO3 |
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| GUO HUAN YIN\\ \ LIU NING\\{,\}\ \ TONG WEI\ \ \Suzhou Teachers College,Suzhou\ \ \Structure Research Laboratory,University of Science and Technology of China,Hefei\.MAGNETOCALORIC EFFECT OF (La0.55Gd0.15)Sr0.3MnO3[J].Chinese Journal of Low Temperature Physics,2003,25(1):46-50. | |
| Authors: | GUO HUAN YIN\\ \ LIU NING\\{ \}\ \ TONG WEI\ \ \Suzhou Teachers College Suzhou\ \ \Structure Research Laboratory University of Science and Technology of China Hefei\ |
| Institution: | GUO HUAN YIN\+1\ \ LIU NING\+\{1,2\}\ \ TONG WEI\+2 \ \+1Suzhou Teachers College,Suzhou\ 234000 \ \+2Structure Research Laboratory,University of Science and Technology of China,Hefei\ 230026 |
| Abstract: | We present a study of magnetocaloric effect in the A site doping colossal magnetoresistance material (La\-\{0.55\}Gd\-\{0.15\})Sr\-\{0.3\}MnO\-3. From the measurement and calculation of magnetization under various temperatures, we have discovered large magnetocaloric effect with the ferromagnetic paramagnetic transition, additional magnetism exchange action introduces additional magnetic entropy change. |
| Keywords: | colossal magnetoresistance ferromagnetic paramagnetic transition magnetocaloric effect magnetic entropy change |
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