Effect of substitution with potassium and chromium oxides on the magnetic and electrical properties of Li-ferrite

被引:10
作者
Samy, A. M. [1 ]
Sattar, A. A. [1 ]
Afify, Ibrahim Hassan [2 ]
机构
[1] Ain Shams Univ, Fac Sci, Dept Phys, Cairo, Egypt
[2] Menoufia Univ, Fac Engn, Phys & Math Eng Dept, Shibin Al Kawm, Egypt
关键词
Inorganic compounds; Magnetic properties; Li-Cr ferrite; Curie temperature; Compensation temperature; INDUCED COMBUSTION SYNTHESIS; CONDUCTIVITY; POWDER; CR;
D O I
10.1016/j.jallcom.2010.06.052
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
Li-ferrite samples substituted with potassium and chromium oxides were prepared by using ceramic method. The chemical formula KyLi0.5-yCrxFe2.5-xO4 (x= 1.15, 1.2,... and 1.35; y = 0.0 and 0.05) was used. The Curie and compensation temperatures, T-c and T-o are decreased respectively with the increasing of the Cr content for all samples with potassium and without potassium. For Li-Cr ferrite, the values of T-o dose not change with potassium substitution ions relative to that sample without potassium at each Cr content. However, the Curie temperature, T-c and ac resistivity were increased (improved) with the potassium substitution relative to the samples without potassium at each Cr content. Furthermore, the magnetization was improved with the increasing of Cr content for, Li-ferrite at a temperature greater than the compensation temperature. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:297 / 301
页数:5
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