Hysteresis of magnetoresistance in granular La0.7Ca0.3MnO3 at low temperatures

被引：0
|
作者：
K. A. Shaykhutdinov
S. V. Semenov
D. A. Balaev
M. I. Petrov
N. V. Volkov
机构：
[1] Russian Academy of Sciences,Kirensky Institute of Physics, Siberian Branch
[2] Siberian Federal University,undefined
来源：
Physics of the Solid State | 2009年 / 51卷
关键词：
72.25.-b; 75.47.-m;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The magnetoresistance of granular La0.7Ca0.3MnO3 is studied experimentally over wide ranges of temperatures and magnetic fields. The emphasis is on anomalously large hysteresis of magnetoresistance at low temperatures (T = 4.2 K). The observed ρ(H) dependence can be qualitatively explained by spin-dependent tunneling of electrons through the dielectric boundaries of conducting granules characterized by a wide spread in the magnetic-moment magnitudes.
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页码：778 / 780
页数：2
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