Critical behavior of ferromagnetic perovskite ruthenates
文献类型：期刊论文
| 作者 | Cheng, JG ; Zhou, JS ; Goodenough, JB ; Jin, CQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 85期号:18 |
| 关键词 | SPIN FLUCTUATIONS SUSCEPTIBILITY EQUATION OXIDES STATE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Cheng, JG: Univ Texas Austin, Mat Sci Program Mech Engn, Austin, TX 78712 USA. |
| 中文摘要 | Stoner-Wohlfarth itinerant-electron ferromagnetism has been believed to be applicable to the metallic, ferromagnetic perovskite SrRuO3. A key piece of evidence is the linearity of the Arrott plot M-2 versus H/M obtained in a previous study. However, a typical Heisenberg behavior observed in isostructural BaRuO3 raises a question how the small structural change between them can place these compounds into two extremes of magnetic interactions. For clarification of this issue, we carried out magnetization measurements in the vicinity of T-c for the whole series of ferromagnetic ruthenates from Ca0.5Sr0.5RuO3 to SrRuO3 to BaRuO3. Moreover, we studied the effects of the A-site size variance and hydrostatic versus nonhydrostatic pressure on the Arrott plot of SrRuO3. Our results reveal that the magnetization behavior as presented by the Arrott plot is extremely sensitive to structural distortions. The linearity of the Arrott plot for SrRuO3 is actually part of a continuous curvature evolution as lattice distortions and spin-orbit coupling change; it may have little to do with Stoner-Wohlfarth itinerant-electron ferromagnetism. The data for these ruthenates point to a distinct phase appearing between localized-electron and broad-band behavior that exhibits a strong ferromagnetism stabilized by strong correlations among electrons of a narrow band. |
| 收录类别 | SCI |
| 资助信息 | Robert A. Welch foundation; NSF in the US [DMR 0904282, 1122603]; MOST in China |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/35287]  |
| 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 | Cheng, JG,Zhou, JS,Goodenough, JB,et al. Critical behavior of ferromagnetic perovskite ruthenates[J]. PHYSICAL REVIEW B,2012,85(18). |
| APA | Cheng, JG,Zhou, JS,Goodenough, JB,&Jin, CQ.(2012).Critical behavior of ferromagnetic perovskite ruthenates.PHYSICAL REVIEW B,85(18). |
| MLA | Cheng, JG,et al."Critical behavior of ferromagnetic perovskite ruthenates".PHYSICAL REVIEW B 85.18(2012). |
入库方式： OAI收割
来源：物理研究所
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