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| Zn掺杂对LaMnO3体系磁性的影响 | |
| 引用本文： | 刘宁,严国清,童伟.Zn掺杂对LaMnO3体系磁性的影响[J].中国稀土学报,2005,23(5):609-612. |
| 作者姓名： | 刘宁 严国清 童伟 |
| 作者单位： | 1. 宿州学院材料实验室,安徽,宿州,234000;中国科学技术大学结构分析开放实验室,安徽,合肥,230026 2. 宿州学院材料实验室,安徽,宿州,234000 3. 中国科学技术大学结构分析开放实验室,安徽,合肥,230026 |
| 基金项目： | 国家自然科学基金重点项目（19934003）和国家重点基础研究发展规划项目（001CB610604）资助 |
| 摘 要： | 研究了LaMn1-xZnxO3 （x=0.05, 0.10, 0.20, 0.30, 0.40）体系的M-T曲线、 M-H曲线、电子自旋共振谱（ESR）. 实验结果表明： 随掺杂浓度增高, 体系的TC单调下降, Zn替代没有引起明显的晶体结构的变化, 磁结构从长程铁磁有序向自旋团簇玻璃态转变, ESR图谱测量的微观磁性与M-T曲线测量的宏观磁性一致. 这些结果归因于Zn掺杂引起的双交换作用、磁稀释作用和晶格效应. |
| 关 键 词： | 凝聚态物理 磁结构 实验 稀土 |
| 文章编号： | 1000-4343（2005）05-0609-04 |
| 收稿时间： | 06 20 2004 12:00AM |
| 修稿时间： | 2004-06-202004-09-03 |
Influence of Zn Doping upon Magnetic Structure of LaMnO3 System |
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| Liu Ning,Yan Guoqing,Tong Wei.Influence of Zn Doping upon Magnetic Structure of LaMnO3 System[J].Journal of the Chinese Rare Earth Society,2005,23(5):609-612. | |
| Authors: | Liu Ning Yan Guoqing Tong Wei |
| Institution: | 1. Materials Laboratory, Suzhou College, Suzhou 234000, China ; 2. Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
| Abstract: | The M-T curves,M-H curves,ESR curves of LaMn_(1-x)Zn_xO_3(x=0.05,0.10,0.20,0.30,0.40) were studied.The experimental results indicate that with increasing Zn doping,T_C value decreases rapidly,the substitution of Zn for Mn does not cause apparent change of the structure,the system undergoes a transition from long range ferromagnetic order to the cluster-spin glass state,the micromagnetism measured by ESR spectra is in accordance with the macromagnetism measured by the M-T curves.The results are attributed to double exchange interaction,magnetic dilution and lattice effects arising from Zn doping. |
| Keywords: | coherence physics magnetic structure experimental rare earths |
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