Nature of electrical hopping conduction and magnetotransport studies in the electron doped manganite Ca0.85Gd0.15MnO3

被引：16
作者：
Khan, Momin Hossain [1 ]
Pal, Sudipta [1 ]
机构：
[1] Univ Kalyani, Dept Phys, Kalyani 741235, W Bengal, India
来源：
PHYSICS LETTERS A | 2015年 / 379卷 / 05期
关键词：
Manganite; Transport properties; Magnetoresistance; MAGNETIC-PROPERTIES; POLARON MOTION; TEMPERATURE; CRYSTALLINE; REVERSAL; LN;
D O I：
10.1016/j.physleta.2014.11.017
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The magnetotransport properties of Ca0.85Gd0.15MnO3 have been studied analyzing the temperature and magnetic field dependent resistivity. High temperature (T > T-CO: charge ordering temperature) conductivity has been found to be described by the non-adiabatic small polaron hopping (SPH) model. The manganite shows a parallel combination of SPH and variable range hopping (VRH) model below T-CO. VRH model fits the corresponding low temperature data. The field depended magnetoresistance (MR) has been investigated with a phenomenological model considering the spin-polarized tunneling. The field dependent MR in scaled coordinate collapses into single curve demonstrating the temperature-independent behavior. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：401 / 406
页数：6
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