On conduction mechanism in paramagnetic phase of Gd based manganites

Bulletin of Materials Science

关键词: Manganite;    conduction mechanism;    small polaron hopping;    variable range hopping.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Materials belonging to the family of manganites are technologically important since they exhibit colossal magneto resistance. A proper understanding of the transport properties is very vital in tailoring the properties. A heavy rare earth doped manganite like Gd0.7Sr0.3MnO3 is purported to be exhibiting unusual properties because of smaller ionic radius of Gd. Gd0.7Sr0.3MnO3 is prepared by a wet solid state reaction method. The conduction mechanism in such a compound has been elucidated by subjecting the material to low temperature d.c. conductivity measurement. It has been found that the low band width material follows a variable range hopping (VRH) model followed by a small polaron hopping (SPH) model. The results are presented here.

【 授权许可】

CC BY