Electrical and thermal transport properties of Sm doped La0�9−xSmxTe0�1MnO3 (0x0�15) manganites

G.-H. Zheng* Z.-X. Dai Y.-Q. Dong Y.-Q. Ma G. Li and H. Zhang

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Electrical and thermal transport properties of Sm doped La0�9−xSmxTe0�1MnO3 (0x0�15) manganites

机译：掺Sm的La0�9−xSmxTe0�1MnO3（0x0�15）锰矿的电学和热输运性质

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The effect of Sm doping at the La site on the electrical and thermal transport properties of electronndoped manganites La0?92xSmxTe0?1MnO3 (0(x(0?15) has been investigated. For all samples,nthere exist two metal–insulator transitions in the temperature dependence of the resistivity curvesnr(T). For all samples, S shows a positive sign over the whole temperature range studied. Both r(T)nand S(T) data in the high temperature range can be well described by the small polaronicnconduction model for all samples studied. As regards the thermal conductivity k(T), the smallnthermal conduction data suggest that there exists a large Jahn–Teller distortion in the studiednsamples. The low temperature k peak is suppressed by Sm doping, and k decreases withnincreasing Sm doping level, which is attributed to the Sm doping hindering the mean free path ofnphonon increase

机译：La位置的Sm掺杂对电子掺杂锰La0？92xSmxTe0？1MnO3（0（x（0？15））的电和热输运性质的影响。对于所有样品，在其中均存在两个金属-绝缘体跃迁。电阻率曲线的温度依赖性nr（T）。对于所有样品，S在所研究的整个温度范围内均显示一个正号。高温范围内的r（T）n和S（T）数据均可通过小的极化电子传导很好地描述导热系数k（T）的模型，较小的热传导数据表明，在所研究的样品中存在较大的Jahn-Teller畸变，低温k峰受到Sm掺杂的抑制，而k随着Sm的增加而减小掺杂水平，这归因于Sm掺杂阻碍了声子平均自由程的增加

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来源
《Materials Research Innovations》 |2012年第3期|p.219-223|共5页
作者
G.-H. Zheng* Z.-X. Dai Y.-Q. Dong Y.-Q. Ma G. Li and H. Zhang;
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作者单位

School of Physics and Material Science, Anhui University, Hefei 230039,China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
Electron doped, Electrical and thermoelectric properties;

机译：电子掺杂;电和热电性能;

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Electrical and thermal transport properties of Sm doped La0�9−xSmxTe0�1MnO3 (0x0�15) manganites

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