Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6
文献类型：期刊论文
| 作者 | Q. Zhang ; G. H. Rao ; H. Z. Dong ; Y. G. Xiao ; X. M. Feng ; G. Y. Liu ; Y. Zhang ; J. K. Liang |
| 刊名 | Physica B-Condensed Matter
 |
| 出版日期 | 2005 |
| 卷号 | 370期号:1-4页码:228-235 |
| 关键词 | double perovskite electron doping crystal structure magnetoresistance low-field magnetoresistance sr2femoo6 temperature transition disorder |
| ISSN号 | 0921-4526 |
| 中文摘要 | The crystal structure and magnetic properties of a series of ordered double perovskite oxides (Sr2-3xLa2xBax)FeMoO6 (0 <= x <= 0.3) have been investigated. X-ray powder diffraction reveals that the crystal structure of the compounds changes from a tetragonal I4/m lattice to a cubic Fm (3) over barm. lattice around x = 0.2. Though the nominal average size of the A site cation of (Sr2-3xLa2xBax)FeMoO6 is designed to be almost independent of x, the refinements of the crystal structure show that the lattice constants increase with x in both the tetragonal and the cubic phase regions due to electron doping. As the x increases, the degree of cationic ordering on the B site is decreased pronouncedly, while the Curie temperature of the compounds is nearly unchanged. The saturation magnetization of the compounds decreases with x and shows a linear dependence on the degree of cation ordering. The resistivity of the parent compound shows a semiconducting behavior below room temperature, but those of the doped samples exhibit a metal-semiconductor transition. A correlation between the resistivity and metal-semiconducting transition temperature (TM-S) is observed. The resistivity and TM-S of the compounds decrease with x for x <= 0.2 and increase for x >= 0.2. Magnetoresistance of the compounds is reduced by the La/Ba doping. All these observations can be understood based on the interplay of the electron doping, change in bandwidth and the anti-site defect concentration. (c) 2005 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35221]  |
| 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 | Q. Zhang,G. H. Rao,H. Z. Dong,et al. Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6[J]. Physica B-Condensed Matter,2005,370(1-4):228-235. |
| APA | Q. Zhang.,G. H. Rao.,H. Z. Dong.,Y. G. Xiao.,X. M. Feng.,...&J. K. Liang.(2005).Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6.Physica B-Condensed Matter,370(1-4),228-235. |
| MLA | Q. Zhang,et al."Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6".Physica B-Condensed Matter 370.1-4(2005):228-235. |
入库方式： OAI收割
来源：金属研究所
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