Influence of nonmagnetic Al ions on magnetoresistance of double-perovskite Sr2Fe1-xAlxMoO6 (0 <= x <= 0.30)
文献类型：期刊论文
| 作者 | Y. Sui ; X. J. Wang ; J. G. Cheng ; Z. G. Liu ; J. P. Miao ; X. Q. Huang ; Z. Lu ; Z. N. Qian ; W. H. Su ; J. K. Tang ; C. K. Ong |
| 刊名 | Journal of Applied Physics
 |
| 出版日期 | 2005 |
| 卷号 | 98期号:6 |
| 关键词 | intergrain tunneling magnetoresistance room-temperature magnetoresistance low-field magnetoresistance sr2femoo6 double perovskite magnetic-properties fe-site polycrystals crystal oxide |
| ISSN号 | 0021-8979 |
| 中文摘要 | The structural, magnetic, and magnetoresistance properties of the double-perovskite series Sr2Fe1-xAlxMoO6 (0 <= x <= 0.30) were systematically investigated in order to clarify the influence of nonmagnetic Al ions on the magnetoresistance. The structural refinements of these samples show that the degree of cationic order increases gradually from 88.5% for x=0 to 92% for x=0.30 without any change in the crystal structure. The magnetization measurements reveal that the substitution of nonmagnetic Al ion for Fe ion enhances the magnetic moment per Fe ion significantly. In addition, the magnetic-field dependence of magnetization and magnetoresistance of these Sr2Fe1-xAlxMoO6 samples were all fitted excellently by taking into account the contributions from ferromagnetic-coupled Fe-O-Mo region and nonferromagnetic-coupled regions. The fitting results indicate that the low-field magnetoresistance can be greatly enhanced due to the separation of the cationic-ordered Fe-O-Mo regions by the paramagnetic Mo-O-Al-O-Mo chains introduced through Al doping. Furthermore, doping nonmagnetic Al ions also suppress the formation of antiferromagnetic Fe-O-Fe antiphase boundaries, and then lead to the improvement of cation ordering and the reduction of magnetoresistance under high field. (c) 2005 American Institute of Physics. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35038]  |
| 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 | Y. Sui,X. J. Wang,J. G. Cheng,et al. Influence of nonmagnetic Al ions on magnetoresistance of double-perovskite Sr2Fe1-xAlxMoO6 (0 <= x <= 0.30)[J]. Journal of Applied Physics,2005,98(6). |
| APA | Y. Sui.,X. J. Wang.,J. G. Cheng.,Z. G. Liu.,J. P. Miao.,...&C. K. Ong.(2005).Influence of nonmagnetic Al ions on magnetoresistance of double-perovskite Sr2Fe1-xAlxMoO6 (0 <= x <= 0.30).Journal of Applied Physics,98(6). |
| MLA | Y. Sui,et al."Influence of nonmagnetic Al ions on magnetoresistance of double-perovskite Sr2Fe1-xAlxMoO6 (0 <= x <= 0.30)".Journal of Applied Physics 98.6(2005). |
入库方式： OAI收割
来源：金属研究所
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