| Ru-doping-induced ferromagnetism in charge-ordered La0.4Ca0.6MnO3 | |
| Lu, C. L.1,2; Chen, X.1,2; Dong, S.1,2; Wang, K. F.1,2; Cai, H. L.1,2; Liu, J. -M.1,2; Li, D.3; Zhang, Z. D.3 | |
| 通讯作者 | Liu, J. -M.(liujm@nju.edu.cn) |
| 2009-06-01 | |
| 发表期刊 | PHYSICAL REVIEW B
 |
| ISSN | 1098-0121 |
| 卷号 | 79期号:24页码:6 |
| 摘要 | Impurity effects on the stability of a charge-ordered antiferromagnetic state in electron-doped manganite La0.4Ca0.6MnO3 are investigated by doping Ru for Mn. Our results show that Ru doping at a tiny level of similar to 2% is sufficient to suppress significantly the charge-ordered insulated state and generate a ferromagnetic metallic one. The blocked metastable state and the first-order metal-insulator transitions observed in the slightly doped samples can be attributed to the phase-separated state where ferromagnetic domains are embedded in the charge-ordered matrix. The doping effect is further investigated theoretically based on the two-orbital model. The calculation suggests that two factors are vitally important for the Ru-doping driven strong ferromagnetic tendency: (1) the ferromagnetic coupling between Ru and Mn spins and (2) the enhancement of e(g) electron density while the topological defects always contribute to the instability of charge-ordered state. |
| 关键词 | antiferromagnetism calcium compounds colossal magnetoresistance electron density ferromagnetism lanthanum compounds magnetisation manganese compounds metal-insulator transition |
| 资助者 | Natural Science Foundation of China ; National Key Projects for Basic Research of China ; 111 Programme of MOE of China |
| DOI | 10.1103/PhysRevB.79.245105 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Natural Science Foundation of China[50601013] ; Natural Science Foundation of China[50832002] ; National Key Projects for Basic Research of China[2006CB921802] ; National Key Projects for Basic Research of China[2009CB623303] ; 111 Programme of MOE of China[B07026] |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| WOS记录号 | WOS:000267699700039 |
| 出版者 | AMER PHYSICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/97187 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Liu, J. -M. |
| 作者单位 | 1.Nanjing Univ, Solid State Microstruct Lab, Nanjing 210093, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, C. L.,Chen, X.,Dong, S.,et al. Ru-doping-induced ferromagnetism in charge-ordered La0.4Ca0.6MnO3[J]. PHYSICAL REVIEW B,2009,79(24):6. |
| APA | Lu, C. L..,Chen, X..,Dong, S..,Wang, K. F..,Cai, H. L..,...&Zhang, Z. D..(2009).Ru-doping-induced ferromagnetism in charge-ordered La0.4Ca0.6MnO3.PHYSICAL REVIEW B,79(24),6. |
| MLA | Lu, C. L.,et al."Ru-doping-induced ferromagnetism in charge-ordered La0.4Ca0.6MnO3".PHYSICAL REVIEW B 79.24(2009):6. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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