Influence of silicon substitution on the properties of lithium ferrite

被引：21

作者：

Verma, Vivek ^{[1
]}

Pandey, Vibhav ^{[1
]}

Kotnala, R. K. ^{[1
]}

Kishan, Hari ^{[1
]}

Kumar, Nitender ^{[1
]}

Kothari, P. C. ^{[1
]}

机构：

[1] Solid State Phys Lab, Delhi 110007, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 443卷 / 1-2期

关键词：

magnetic properties; saturation magnetic moment; coercivity; dielectric constant;

D O I：

10.1016/j.jallcom.2007.03.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Silicon substituted lithium ferrite of different compositions (Li0.5(1+x)SixFe2.5-1.5xO4) were prepared for x = 0-0.6 by ceramic standard technique. The magnetic and electrical properties of synthesized samples have been determined. A structural characterization of all the samples was conducted by the X-ray diffraction technique. The grain size ranging from 5.5 to 16 mu m were studied with respect to compositions by SEM pictures. The maximum value 75.23 emu/g of saturation magnetization of silicon substituted lithium ferrite at x = 0.4 molar concentration of silicon was observed. The measured real part of dielectric constant (epsilon') and loss tangent (tan delta) of mixed Li-Si ferrite decreases with increasing silicon concentration in ferrite. Such variations in dielectric properties are due of Fe2+ and Fe3+ Concentrations on octahedral sites and electronic hopping frequency between Fe2+ and Fe3+ ions. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：178 / 181

页数：4

共 11 条

[1]

Globus A., 1977, J PHYS C SOLID STATE, V38

[2]

JAFFERSON CF, 1968, IEEE T MAGN, V4, P460

[3] ORIGIN OF CORE LOSSES IN A MANGANESE ZINC FERRITE WITH APPRECIABLE SILICA CONTENT [J].