Anomalous positive magnetoresistance effect in La0.67Ca0.33MnO3 microbridges
文献类型：期刊论文
| 作者 | Guo, X ; Li, PG ; Wang, X ; Fu, XL ; Chen, LM ; Lei, M ; Zheng, W ; Tang, WH |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2009 |
| 卷号 | 485期号:1-2页码:802 |
| 关键词 | NANOSTRUCTURED LA0.67CA0.33MNO3 THIN-FILMS NANOWIRES TRANSPORT LA1-XCAXMNO3 TRANSITION NETWORKS PHASE |
| ISSN号 | 0925-8388 |
| 通讯作者 | Tang, WH: Zhejiang Sci Tech Univ, Dept Phys, Ctr Optoelect Mat & Devices, Xiasha Coll Pk, Hangzhou 310018, Zhejiang, Peoples R China. |
| 中文摘要 | Microbridges were fabricated from the well epitaxial La0.67Ca0.33MnO3 films by the electron beam lithography (EBL) technology. The metal-insulator transition temperature (T-P) decreases with the reduced bridge width, and the transition even disappears over the measured temperature range for the bridge with 500 nm width The phenomena may be the result of the confined geometry. which will be dominated by the filamentary conduction The most intriguing effect is the positive MR for the widths of 15.1 mu m under the 1 T magnetic field and it reaches around 25% at 175 K for the 1 mu m bridge The reason for the observation could be attributed to spin disorder enhanced electron-electron interactions at low temperatures, which can produce positive correction to the conductivity. The revealed size effect is valuable for getting further understanding about the mechanism of colossal magnetoresistance effect. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 资助信息 | Zhejiang Provincial Natural Science Foundation [Z605131]; National Natural Science Foundation of China [60571029, 60321001] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/33870]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Guo, X,Li, PG,Wang, X,et al. Anomalous positive magnetoresistance effect in La0.67Ca0.33MnO3 microbridges[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2009,485(1-2):802. |
| APA | Guo, X.,Li, PG.,Wang, X.,Fu, XL.,Chen, LM.,...&Tang, WH.(2009).Anomalous positive magnetoresistance effect in La0.67Ca0.33MnO3 microbridges.JOURNAL OF ALLOYS AND COMPOUNDS,485(1-2),802. |
| MLA | Guo, X,et al."Anomalous positive magnetoresistance effect in La0.67Ca0.33MnO3 microbridges".JOURNAL OF ALLOYS AND COMPOUNDS 485.1-2(2009):802. |
入库方式： OAI收割
来源：物理研究所
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