Magneto-transport properties of La0.7Ca0.3MnO3/SrTiO3/La0.7Ce0.3MnO3 tunnel junction

被引：0
|
作者：
P Raychaudhuri
C Mitra
K Dorr
KH Muller
G Kobernik
R Pinto
机构：
[1] University of Birmingham,Department of Physics and Astronomy
[2] Institut fur Festkorper und Wekstofforschung,undefined
[3] Dresden,undefined
[4] Tata Institute of Fundamental Research,undefined
来源：
Pramana | 2002年 / 58卷
关键词：
La; Ce; MnO; /SrTiO; /La; Ce; MnO; tunnel junction; magneto-transport properties; magnetoresistance; 73.40.Gk; 75.30.Vn;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Hole-doped rare-earth manganite La0.7Ca0.3MnO3 and the electron-doped manganite La0.7Ce0.3MnO3 both show a metal-insulator transition around 250 K associated with a ferromagnetic transition and colossal magnetoresistance. In an earlier publication we have reported the rectifying characteristic of La0.7Ca0.3MnO3/SrTiO3/La0.7Ce0.3MnO3 tunnel junction at room temperature, showing that it is possible to fabricate a diode out of the polaronic insulator regime of doped manganites. Here we report the magneto-transport properties of such a tunnel junction above and below the metal-insulator transition. We show, from the large positive magnetoresistance of the tunnel junction at low temperature, that La0.7Ce0.3MnO3 could be a minority spin carrier ferromagnet. The implication of this observation is discussed.
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页码：1179 / 1182
页数：3
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