Structure, magnetic and transport properties of (La1/2Sr1/2)(1-x) (Gd1/2Ba1/2)(x)CoO3 perovskites
文献类型：期刊论文
| 作者 | Sun, JR ; Liu, ZX ; Wong, HK |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 1999 |
| 卷号 | 11期号:45页码:8893 |
| 关键词 | METAL-INSULATOR-TRANSITION PHASE-TRANSITIONS CATION DISORDER CHARGE FIELD PR1-XCAXMNO3 MANGANITES SPIN |
| ISSN号 | 0953-8984 |
| 通讯作者 | Sun, JR (reprint author), Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong. |
| 中文摘要 | Structural, magnetic and transport properties of (La1/2Sr1/2)(1-x)(Gd1/2Ba1/2)(x)CoO3 with x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 were experimentally studied. The system exhibits a rhombohedrally distorted perovskite structure for x less than or equal to 0.6. A rhombohedral-orthorhombic structure transition is induced by the introduction of Gd1/2Ba1/2 at x = 0.7, resulting in a significant volume contraction of the unit cell. Due to the increased A-cation disorder, the presence of Gd1/2Ba1/2 suppresses the ferromagnetic order and enhances the resistivity of the compounds, as demonstrated by the shift of the magnetic transition from similar to 255 to similar to 160 K for x from 0.0 to 0.8 and the occurrence of the semiconducting conduction for x greater than or equal to 0.6. When the content of Gd1/2Ba1/2 exceeds a critical value of similar to 0.7, charge ordering occurs and develops below a critical temperature (similar to 375 K) essentially independent of doping level. It appears that the charge ordering induces the volume contraction of the compounds. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53623]  |
| 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 | Sun, JR,Liu, ZX,Wong, HK. Structure, magnetic and transport properties of (La1/2Sr1/2)(1-x) (Gd1/2Ba1/2)(x)CoO3 perovskites[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,1999,11(45):8893. |
| APA | Sun, JR,Liu, ZX,&Wong, HK.(1999).Structure, magnetic and transport properties of (La1/2Sr1/2)(1-x) (Gd1/2Ba1/2)(x)CoO3 perovskites.JOURNAL OF PHYSICS-CONDENSED MATTER,11(45),8893. |
| MLA | Sun, JR,et al."Structure, magnetic and transport properties of (La1/2Sr1/2)(1-x) (Gd1/2Ba1/2)(x)CoO3 perovskites".JOURNAL OF PHYSICS-CONDENSED MATTER 11.45(1999):8893. |
入库方式： OAI收割
来源：物理研究所
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