Ru-doping-induced ferromagnetism in charge-ordered La(0.4)Ca(0.6)MnO(3)
文献类型：期刊论文
| 作者 | C. L. Lu ; X. Chen ; S. Dong ; K. F. Wang ; H. L. Cai ; J. M. Liu ; D. Li ; Z. D. Zhang |
| 刊名 | Physical Review B
 |
| 出版日期 | 2009 |
| 卷号 | 79期号:24 |
| 关键词 | antiferromagnetism calcium compounds colossal magnetoresistance electron density ferromagnetism lanthanum compounds magnetisation manganese compounds metal-insulator transition cr-doped nd1/2ca1/2mno3 phase-separation manganites transition |
| ISSN号 | 1098-0121 |
| 中文摘要 | Impurity effects on the stability of a charge-ordered antiferromagnetic state in electron-doped manganite La(0.4)Ca(0.6)MnO(3) 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. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32146]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | C. L. Lu,X. Chen,S. Dong,et al. Ru-doping-induced ferromagnetism in charge-ordered La(0.4)Ca(0.6)MnO(3)[J]. Physical Review B,2009,79(24). |
| APA | C. L. Lu.,X. Chen.,S. Dong.,K. F. Wang.,H. L. Cai.,...&Z. D. Zhang.(2009).Ru-doping-induced ferromagnetism in charge-ordered La(0.4)Ca(0.6)MnO(3).Physical Review B,79(24). |
| MLA | C. L. Lu,et al."Ru-doping-induced ferromagnetism in charge-ordered La(0.4)Ca(0.6)MnO(3)".Physical Review B 79.24(2009). |
入库方式： OAI收割
来源：金属研究所
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