| La0.67Sr0.33FexMn1-xO3制备和奇特磁电阻效应 |
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| 引用本文： | 李亚栋,章建辉,朱长飞,刘卫,熊曹水,周移,钱逸泰.La0.67Sr0.33FexMn1-xO3制备和奇特磁电阻效应[J].物理化学学报,1997,13(12):1079-1083. |
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| 作者姓名： | 李亚栋 章建辉 朱长飞 刘卫 熊曹水 周移 钱逸泰 |
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| 作者单位： | Structure Reaserch Laboratory,Academia Sinica,Hefei 230026,Chemistry Department,University of Science and Technology of China,Hefei 230026,Laboratory of Interner Friction and Defects in Solid Academia Sinica,Hefei 230026 |
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| 摘 要： |
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| 关 键 词： | 共沉淀工艺 三方结构 巨磁电阻效应 |
| 收稿时间： | 1997-02-03 |
| 修稿时间： | 1997-05-05 |
Preparation and Pecuiar Magnetoresistance of La0.67Sr0.33FexMn1-xO3 |
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| Li Ya-Dong,Zhang Jian-Hui,Zhu Chang-Fei,Liu Wei,Xiong Cao-Shui,Zhou Yi,Qian Yi-Tai.Preparation and Pecuiar Magnetoresistance of La0.67Sr0.33FexMn1-xO3[J].Acta Physico-Chimica Sinica,1997,13(12):1079-1083. |
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| Authors: | Li Ya-Dong Zhang Jian-Hui Zhu Chang-Fei Liu Wei Xiong Cao-Shui Zhou Yi Qian Yi-Tai |
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| Institution: | Structure Reaserch Laboratory,Academia Sinica,Hefei 230026|Chemistry Department,University of Science and Technology of China,Hefei 230026|Laboratory of Interner Friction and Defects in Solid Academia Sinica,Hefei 230026 |
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| Abstract: | The Ln0.67Sr0.33Fe.Mn1-xO3(LSFMO)(0.05< x <0.33) systems have been synthesized by co-precipitation. The X-ray diffraction patterns indicates that these compounds are of single phase with rhombohedral structure. The resistivity of samples was measured in zero field and applied field (H=4000Oe) by a standard four-probe method. Large magnetoresistance (MR) was found in all samples. There is a resistivity transition peak in LSFMO (x ≦0.13) in which MR negative, the temperature (TP) at which the resistivity peak occurs decreases with the increasing of x. LSFMO (x=0.23) to which the large negative MR is still found is a semiconductor, It is unexpected that a peculiar alternative positive negative MR was found in LSFMO(x=0.33) which also is a semicondutor. |
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| Keywords: | Co-precipitation Route Rhombohedral structure Magnetoresistance |
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