| 过渡金属离子掺杂对La1.2Ca1.8Mn2O7输运性质的影响 |
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| 引用本文： | 陈春霞,章建辉,钱天,周桃飞,李慧玲. 过渡金属离子掺杂对La1.2Ca1.8Mn2O7输运性质的影响[J]. 低温物理学报, 2005, 27(4): 338-343 |
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| 作者姓名： | 陈春霞 章建辉 钱天 周桃飞 李慧玲 |
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| 作者单位： | 中国科学技术大学材料科学与工程系,合肥,230026;安庆师范学院物理系,安徽安庆,246011;中国科学技术大学材料科学与工程系,合肥,230026 |
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| 摘 要： | 研究了过渡金属元素掺杂对层状钙钛矿结构锰氧化物La1.2Ca1.8Mn2O7体系输运性质的影响.实验结果表明不同过渡金属离子掺杂均导致体系的金属-绝缘转变温度降低,电阻率与最大磁电阻值(Cr除外)增加.当掺杂量较高时,磁性Cr、Fe、Co、Ni离子对体系性质的影响与其磁性相互作用密切相关.
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| 关 键 词： | 锰氧化物 输运性质 过渡金属 掺杂 |
| 收稿时间： | 2004-09-20 |
| 修稿时间： | 2004-11-17 |
TRANSITION-ELEMENT DOPING EFFECTS IN La1.2Ca1.8Mn2O7 |
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| CHEN CHUN-XIA,ZHANG JIAN-HUI,QIAN-TIAN,ZHOU TAO-FEI,LI HUI-LING. TRANSITION-ELEMENT DOPING EFFECTS IN La1.2Ca1.8Mn2O7[J]. Chinese Journal of Low Temperature Physics, 2005, 27(4): 338-343 |
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| Authors: | CHEN CHUN-XIA ZHANG JIAN-HUI QIAN-TIAN ZHOU TAO-FEI LI HUI-LING |
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| Affiliation: | 1 Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026;2 Department of Physics ,Anqing Teacher College, Anhui 246011 |
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| Abstract: | The influences of transition element doping on the transport properties of layered perovskite manganite La_1.2Ca_1.8Mn_2O_7 were investigated. The values of the metal-insulator transition temperature are shifted to lower temperature, whereas the values of resistance and magnetoresistance (except Cr) are increased for all the transition element doping systems. The influences ofmagnetic ions like Cr, Fe, Co and Nidoping on the properties of the systemsare related to their additional magnetic couplingin a relatively high doping content. |
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| Keywords: | manganites transition-element doping transport properties |
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