| La1-xLixMnO3体系的输运特性及EPR研究 |
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| 引用本文： | 周险峰,李莉萍,宋小羽,苗继鹏,苏文辉. La1-xLixMnO3体系的输运特性及EPR研究[J]. 高等学校化学学报, 1999, 20(4): 629-633 |
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| 作者姓名： | 周险峰 李莉萍 宋小羽 苗继鹏 苏文辉 |
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| 作者单位： | 1. 吉林大学物理系, 长春 130023;2. 中国科学院长春应用化学研究所稀土化学与物理开放实验室, 长春 130022;3. 中国科学院国际材料物理中心, 沈阳 110015 |
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| 基金项目： | 中国科学院资助项目;19804005; |
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| 摘 要： | 利用固相反应法合成了掺杂锂的La1-xLixMnO3(x=0,0.10,0.15,0.20,0.25,0.30)钙钛矿氧化物.XRD测试表明,所有样品均为菱方结构.除x=0,0.3外,其它样品均随温度的降低在液氮温区可观察到从绝缘态到金属态的转变,其中x=0.15样品的转变温度最高为167K.在H=1T的磁场下,出现了负磁阻现象.EPR谱上的g=2.00信号与Mn3+和Mn4+组成的复合团簇有关.
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| 关 键 词： | La1－xLixMnO3 EPR Mn3+－Mn4+复合团簇 磁阻 |
| 收稿时间： | 1998-08-31 |
Transport Property and EPR Studies for La1-xLixMnO3 System |
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| ZHOU Xian-Feng,LI Li-Ping,SONG Xiao-Yu,MIAO Ji-Peng,SU Wen-Hui. Transport Property and EPR Studies for La1-xLixMnO3 System[J]. Chemical Research In Chinese Universities, 1999, 20(4): 629-633 |
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| Authors: | ZHOU Xian-Feng LI Li-Ping SONG Xiao-Yu MIAO Ji-Peng SU Wen-Hui |
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| Affiliation: | 1. Department of Physics, Jilin Universitya, Changchun, 130023;2. Key Lab. of Rare Earth Chemistry and Physics, Chinese Academy of Sciences, Changchun, 130022;3. International Center for Materials Physics, Academia Sinica, Shenyang, 110015 |
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| Abstract: | The perovskite oxides La-{%1-x%}Li-%x%MnO-3 were prepared by solid state reactions. The XRD results indicate that all samples crystallize in rhombohedral structure. Except %x%=0^0, 0^3 ones, all samples show a transition from insulator to metal with decreasing temperature within the liquid nitrogen temperature region, where %x%=0^15 sample exhibits the highest transition temperature. The negative magnetoresistance phenomena is observed at applying the magnetic field with %H%=1^0 T. The EPR signal with %g%=2^00 is closely related with the complex of Mn+{3+}|Mn+{4+} clusters. |
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| Keywords: | La1-xLixMnO3 EPR |
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