Ionic size effect on magnetic and electronic properties of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = La, Nd, Gd, Ho, Y)
文献类型：期刊论文
| 作者 | Luo, WJ ; Shi, FJ ; Wang, FW |
| 刊名 | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
 |
| 出版日期 | 2006 |
| 卷号 | 305期号:2页码:509 |
| 关键词 | METAL-INSULATOR-TRANSITION INTERMEDIATE-SPIN STATE CRYSTAL-STRUCTURE LA1-XSRXCOO3 LACOO3 MAGNETORESISTANCE SPECTROSCOPY TEMPERATURE TRANSPORT GLASS |
| ISSN号 | 0304-8853 |
| 通讯作者 | Luo, WJ: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | The structural, magnetic and electronic transport properties of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = La, Nd, Gd, Ho, Y) have been investigated by X-ray diffraction and the magnetization and resistivity measurements. All the samples crystallize into hexagonal lattice with the space group R-3C (A167) at room temperature. Small doped ions shrink the lattices almost linearly and isotropically, and bend the Co-O-Co bond angle. Although the Co atoms in all compounds are stabilized in intermediate-spin electronic configuration, the (residual) resistivity (T --> 0) increase significantly with doping of the small ions. At low temperatures, the compounds change from metallic state of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = La, Nd, Gd) to insulated state of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = Ho, Y). The 5-7% magnetoresistance (MR) near Curie temperature can be interpreted in terms of the external field suppression of the spin fluctuation, but the relative large MR in the insulator state of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = Ho, Y) (similar to 20% up to 50-kOe field at 5 K) probably results from the field-induced transfer integral and the tunneling effect. (C) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40382]  |
| 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 | Luo, WJ,Shi, FJ,Wang, FW. Ionic size effect on magnetic and electronic properties of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = La, Nd, Gd, Ho, Y)[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2006,305(2):509. |
| APA | Luo, WJ,Shi, FJ,&Wang, FW.(2006).Ionic size effect on magnetic and electronic properties of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = La, Nd, Gd, Ho, Y).JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,305(2),509. |
| MLA | Luo, WJ,et al."Ionic size effect on magnetic and electronic properties of La(0.70)A(0.05)Sr(0.25)CoO(3) (A = La, Nd, Gd, Ho, Y)".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 305.2(2006):509. |
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来源：物理研究所
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