| 稀土掺杂La-Sr-Mn-O的室温磁致伸缩效应 |
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| 引用本文： | 曹庆琪,吴 坚,谷坤明,唐 涛,张世远,都有为.稀土掺杂La-Sr-Mn-O的室温磁致伸缩效应[J].物理学报,1999,48(13):268-273. |
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| 作者姓名： | 曹庆琪 吴 坚 谷坤明 唐 涛 张世远 都有为 |
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| 作者单位： | 南京大学物理系，固体微结构物理国家重点实验室，南京 210093 |
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| 基金项目： | 国家自然科学基金（批准号：19974032）资助的课题. |
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| 摘 要： | 采用两种不同的方法制备了不同稀土含量的(La1-xRx)2/3Sr1/3MnO3(R=Sm,Tb)大块多晶样品，并研究了它们的晶体结构及室温下的磁致伸缩效应.分析表明，随Sm，Tb对La的替代，样品的晶体结构从菱面体相转变为正交相.在结构相转变点附近，样品在室温下的磁致伸缩效应出现极大值.样品在室温下的磁致伸缩主要来源于材料中的交换磁致伸缩.
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| 收稿时间： | 7/5/1999 12:00:00 AM |
| 修稿时间： | 8/9/1999 12:00:00 AM |
Magnetostriction in (La1-xRx)2/3Sr1/3MnO3 at Room Temperature |
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| Cao Qing-Qi,Wu Jian,Gu Kun-Ming,Tang Tao,Zhang Shi-Yuan and Du You-Wei.Magnetostriction in (La1-xRx)2/3Sr1/3MnO3 at Room Temperature[J].Acta Physica Sinica,1999,48(13):268-273. |
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| Authors: | Cao Qing-Qi Wu Jian Gu Kun-Ming Tang Tao Zhang Shi-Yuan and Du You-Wei |
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| Abstract: | A series of polycrystaline bulk (La1-xRx)2/3Sr1/3MnO3(R=Sm,Tb) over a wide composition range were prepared by two different techniques, and their structure nd magnetostriction effect were studied carefully at room temperature. The X-ray diffraction pattern indicated that the structure of samples transformed from rhombohedral type to orthorhombic phase with decreasing R contents. The sample, composition near the transformation point, had the maximum value of magnetostriction. The magnetostriction may come from the exchange magnetostriction in the samples at room temperature. |
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