Study of conduction mechanism in aluminium and magnesium co-substituted lithium ferrite

被引：10

作者：

Pandya, MP ^{[1
]}

Modi, KB ^{[1
]}

Joshi, HH ^{[1
]}

机构：

[1] Saurashtra Univ, Dept Phys, Rajkot 360005, Gujarat, India

来源：

JOURNAL OF MATERIALS SCIENCE | 2005年 / 40卷 / 19期

关键词：

D O I：

10.1007/s10853-005-4416-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The conduction mechanism in Mg2+ and Al3+ substituted Li0.5Fe2.5O4 with general formula MgxAl2x Li0.5(1- x)Fe2.5(1- x) O-4 (x = 0.0, 0.2, 0.5, 0.6 and 0.7) has been studied by means of compositional and temperature dependent d.c. resistivity, thermoelectric power and I - V characteristics measurements. It is found that ferrites are electronic conductors. For x = 0.0 and 0.2 conduction is due to holes, while for x = 0.5, 0.6 and 0.7 it is due to electrons. Thermal variation of mobilities and activation energies determined through d.c. resistivity measurements confirm the formation of small polarons. The sample with x = 0.0 exhibits switching phenomena. C (c) 2005 Springer Science + Business Media, Inc.

引用

页码：5223 / 5232

页数：10

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