Effect of the calcination temperature on the magnetic and transport properties of rhombohedral LaMnO(3+delta) compounds
文献类型：期刊论文
| 作者 | X. L. Wang ; D. Li ; C. X. Shi ; B. Li ; T. Y. Cui ; Z. D. Zhang |
| 刊名 | Physica B-Condensed Matter
 |
| 出版日期 | 2010 |
| 卷号 | 405期号:5页码:1362-1368 |
| 关键词 | Polymerized synthesis Magnetic properties Magnetoresistance giant magnetoresistance manganites ceramics |
| ISSN号 | 0921-4526 |
| 中文摘要 | Rhombohedral LaMnO(3+delta) powders were successfully synthesized by annealing gel precursors obtained by a polymerized complex method. The average grain size increases with increasing calcination temperature. The zero-field-cooled (ZFC) and field-cooled (FC) magnetization curves indicate that LaMnO(3+delta) compounds obtained at 700 and 800 degrees C are ferromagnetic, while both ferromagnetic and antiferromagned c components are present in those calcined at 900 and 1000 degrees C. This is because the concentration of Mn(4+) ions drops with increasing calcination temperature. The temperature dependence of the resistivity of LaMnO(3+delta) Compounds exhibits an insulator-metal transition at about 90 K and also a low-temperature upturn with a resistivity minimum at about 40 K. Upon increasing particle size, the zero-field resistivity of the LaMnO(3+delta) powders increases due to suppression of the conduction by the insulating antiferromagnetic component. The negative magnetoresistance of a sample pellet prepared at 700 degrees C ranges from - 82% to - 88% in the temperature range of 40-100 K due to suppression of the spin-dependent scattering by an applied field. (C) 2009 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31528]  |
| 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 | X. L. Wang,D. Li,C. X. Shi,et al. Effect of the calcination temperature on the magnetic and transport properties of rhombohedral LaMnO(3+delta) compounds[J]. Physica B-Condensed Matter,2010,405(5):1362-1368. |
| APA | X. L. Wang,D. Li,C. X. Shi,B. Li,T. Y. Cui,&Z. D. Zhang.(2010).Effect of the calcination temperature on the magnetic and transport properties of rhombohedral LaMnO(3+delta) compounds.Physica B-Condensed Matter,405(5),1362-1368. |
| MLA | X. L. Wang,et al."Effect of the calcination temperature on the magnetic and transport properties of rhombohedral LaMnO(3+delta) compounds".Physica B-Condensed Matter 405.5(2010):1362-1368. |
入库方式： OAI收割
来源：金属研究所
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