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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： | 2002-10-25 |
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 Technology of China Hefei |
| Affiliation: | 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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