Ferromagnetic tendency at the surface of CE-type charge-ordered manganites
文献类型：期刊论文
| 作者 | S. Dong ; R. Yu ; S. Yunoki ; J. M. Liu ; E. Dagotto |
| 刊名 | Physical Review B
 |
| 出版日期 | 2008 |
| 卷号 | 78期号:6 |
| 关键词 | double-exchange model magnetic-properties doped manganites phase-diagram low-temperature states la2/3sr1/3mno3 nanoparticles |
| ISSN号 | 1098-0121 |
| 中文摘要 | Most previous investigations have shown that the surface of a ferromagnetic material may have antiferromagnetic tendencies. However, experimentally, the opposite effect has been recently observed-ferromagnetism appears in some nanosized manganites with a composition such that the antiferromagnetic charge-ordered CE state is observed in the bulk. A possible origin is the development of ferromagnetic correlations at the surface of these small systems. To clarify these puzzling experimental observations, we have studied the two-orbital double-exchange model near half doping, n = 0.5, using open boundary conditions to simulate the surface of either bulk or nanosized manganites. Considering the enhancement of surface charge density due to a possible AO termination (A = trivalent/divalent ion composite, O = oxygen), an unexpected surface phase-separated state emerges when the model is studied using Monte Carlo techniques on small clusters. This tendency suppresses the CE charge ordering and produces a weak ferromagnetic signal that could explain the experimental observations. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32720]  |
| 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 | S. Dong,R. Yu,S. Yunoki,et al. Ferromagnetic tendency at the surface of CE-type charge-ordered manganites[J]. Physical Review B,2008,78(6). |
| APA | S. Dong,R. Yu,S. Yunoki,J. M. Liu,&E. Dagotto.(2008).Ferromagnetic tendency at the surface of CE-type charge-ordered manganites.Physical Review B,78(6). |
| MLA | S. Dong,et al."Ferromagnetic tendency at the surface of CE-type charge-ordered manganites".Physical Review B 78.6(2008). |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。