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中国物理学会期刊
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钙钛矿锰氧化物La1－xTexMnO3(x=0.04, 0.1)的两类磁电阻现象

, 2005, 54(1): 379-383.
DOI: 10.7498/aps.54.379
CSTR: 32037.14.aps.54.379

Two magnetoresistance phenomena in perovskite manganite of La1－xTexMnO3(x=0.04, 0.1)

Acta Phys. Sin., 2005, 54(1): 379-383.
DOI: 10.7498/aps.54.379
CSTR: 32037.14.aps.54.379
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  • 摘要

    La1-xTexMnO3(x=004,01)是一种具有钙钛矿结构的电子掺杂型锰氧化物.实验结果表明：在这种锰氧化物中同时存在庞磁阻（CMR）效应和低场磁电阻（LFMR）效应.在整个实验温度范围（5—300K），LFMR随温度升高而发生了如下变化：出现—消失—出现，在LFMR消失的温区又恰好能观察到明显的CMR.对其原因给予了解释.

     

    Abstract

    The colossal magnetoresistance (CMR) effect and the low-field magnetoresistance (LFMR) of the electron-doped manganites La1-xTexMnO3 (x=0 04, 01) have been observed. The experimental results showed that LFMR of the samples varied with the increase of temperature from 5 to 300 K as follows: app earing-disappearing-appearing again. Furthermore, the samples exhibited large CM R in the temperature regime where the LFMR disappear. These related results have been analyzed.

     

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