Enhancement of "intrinsic" magnetoresistance ratio and activation energy of la0.67ca0.33mno3 single crystals by fe doping
文献类型：期刊论文
| 作者 | Kou, ZQ; Di, NL; Ma, X; Li, QA; Cheng, ZH |
| 刊名 | Chinese physics
 |
| 出版日期 | 2005-08-01 |
| 卷号 | 14期号:8页码:1653-1656 |
| 关键词 | Perovskite manganites Colossal magnetoresistance (cmr) Magnetic polarons |
| ISSN号 | 1009-1963 |
| 通讯作者 | Kou, zq(kzq77@yahoo.com.cn) |
| 英文摘要 | In order to avoid the complicated influence of grain boundaries on the resistivity in the investigation of the "intrinsic" magnetoresistance (mr) effect, the magnetic and magnetotransport properties of la0.67ca0.33mno3 and la0.67ca0.33mn0.96fe0.04o3 single crystals were investigated. owing to the absence of grain boundaries in the single crystals, mr ratio under 40 x 10(5)a/m is about two orders of magnitude larger than that in polycrystalline counterparts. a further enhancement of mr ratio from 3400% to 17600% was achieved by a few percent of fe doping. on the basis of the small polaron model, the activation energy derived from fitting the resistivity above t-c was found to increase upon introducing fe. a connection between the strong localization of electrons arising from magnetic polarons and the enhancement of mr was observed in the single crystals. |
| WOS关键词 | COLOSSAL MAGNETORESISTANCE ; GIANT MAGNETORESISTANCE ; MAGNETIC-PROPERTIES ; FILMS ; TRANSITION |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000230997200034 |
| 出版者 | CHINESE PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373601 |
| 专题 | 物理研究所 |
| 通讯作者 | Kou, ZQ |
| 作者单位 | Chinese Acad Sci, Inst Phys, State Key Lab Magnesium, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kou, ZQ,Di, NL,Ma, X,et al. Enhancement of "intrinsic" magnetoresistance ratio and activation energy of la0.67ca0.33mno3 single crystals by fe doping[J]. Chinese physics,2005,14(8):1653-1656. |
| APA | Kou, ZQ,Di, NL,Ma, X,Li, QA,&Cheng, ZH.(2005).Enhancement of "intrinsic" magnetoresistance ratio and activation energy of la0.67ca0.33mno3 single crystals by fe doping.Chinese physics,14(8),1653-1656. |
| MLA | Kou, ZQ,et al."Enhancement of "intrinsic" magnetoresistance ratio and activation energy of la0.67ca0.33mno3 single crystals by fe doping".Chinese physics 14.8(2005):1653-1656. |
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来源：物理研究所
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