| 钙钛矿氧化物La0.3Ca0.7MnO3的磁性质 |
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| 引用本文： | 梁燕,彭振生,严国清,郭焕银,蔡之让.钙钛矿氧化物La0.3Ca0.7MnO3的磁性质[J].稀有金属,2005,29(4):513-516. |
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| 作者姓名： | 梁燕 彭振生 严国清 郭焕银 蔡之让 |
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| 作者单位： | 1. 宿州学院巨磁材料研究室,安徽,宿州,234000
2. 宿州学院巨磁材料研究室,安徽,宿州,234000;中国科学技术大学结构分析重点实验室,安徽,合肥,230026 |
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| 基金项目： | 国家自然科学基金重点项目 (19934003);国家重点基础研究发展规划项目 (001CB610604);安徽省教育厅自然科学研究计划项目 (2004Kj331) |
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| 摘 要： | 采用固相反应法制备了样品La0.3Ca0.7MnO3. 通过测量样品的M-T曲线、 M-H曲线和ESR曲线, 研究了La0.3Ca0.7MnO3的磁性质. 结果表明 在262 K时形成电荷有序相(CO相). 当T＞262 K时, 表现为顺磁;当T＜190 K时, 表现为长程反铁磁(在AFM本底中存在少量FM成分);从262～190 K(TCO), 随温度降低在电荷有序态下从顺磁向反铁磁转变.
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| 关 键 词： | 凝聚态物理 电荷有序 磁结构 钙钛矿氧化物 |
| 文章编号： | 0258-7076(2005)04-0513-04 |
| 修稿时间： | 2005年3月20日 |
Magnetic Properties of Perovskite Oxide La0.3Ca0.7MnO3 |
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| Liang Yan,Peng Zhensheng,YAN Guoqing,Guo Huanyin,Cai Zhirang.Magnetic Properties of Perovskite Oxide La0.3Ca0.7MnO3[J].Chinese Journal of Rare Metals,2005,29(4):513-516. |
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| Authors: | Liang Yan Peng Zhensheng YAN Guoqing Guo Huanyin Cai Zhirang |
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| Affiliation: | Liang Yan1,Peng Zhensheng |
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| Abstract: | The sample of (La_(0.3)Ca_(0.7)MnO_3) was prepared by the solid-state reaction method. The magnetic properties of (La_(0.3)Ca_(0.7)MnO_3) were studied by the measurements of its M-T curve, M-H curve and ESR curve. The results are as follows: the charge ordering(CO) phase is formed at 262 K; it exhibits paramagnetism when T>262 K; it exhibits long-range antiferromagnetism when T<190 K(there is a little FM composition in the AFM background); it transforms from paramagnetism to antiferromagnetism in the CO state with the temperature decreasing from 262 K )T_(co)) to 190 K. |
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| Keywords: | condensed matter physics charge ordering magnetic structure perovskiue oxide |
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