Dielectric and magnetic properties of CoFe2O4 prepared by sol-gel auto-combustion method

被引：79

作者：

Zhang, Ru ^{[2
]}

Sun, Li ^{[1
,2
]}

Wang, Zhenduo ^{[2
]}

Hao, Wentao ^{[2
]}

Cao, Ensi ^{[2
]}

Zhang, Yongjia ^{[2
]}

机构：

[1] Taiyuan Univ Technol, Minist Educ, Key Lab Adv Transducers & Intelligent Control Sys, Taiyuan 030024, Shanxi, Peoples R China

[2] Taiyuan Univ Technol, Coll Phys & Optoelect, Taiyuan 030024, Shanxi, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2018年 / 98卷

基金：

美国国家科学基金会;

关键词：

CoFe2O4; Sol-gel auto-combustion method; Ferrites; Magnetic properties; COBALT FERRITE; PARTICLE-SIZE; COPRECIPITATION; NANOPARTICLES; TEMPERATURE; BEHAVIOR; SPINEL;

D O I：

10.1016/j.materresbull.2017.08.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cobalt ferrite powders were successfully synthesized by sol-gel auto-combustion method. Influence of sintering temperature on structural, magnetic and dielectric properties was studied. All the obtained samples are spinet ferrite with a cubic symmetry. As the sintering temperature increased from 900 degrees C to 1300 degrees C, the average grain size increased from 0.26 mu m to 0.83 mu m The dielectric constant and loss tangent measurement showed strong temperature dependence at all frequencies. The maximum magnetization increased while the coercivity and remanent magnetization decreased with the increasing sintering temperature. The non-saturation at high fields may be related to the surface effects in CoFe2O4 samples. When sintered at 1300 degrees C, the sample showed a maximum magnetization value of similar to 87.32 emu/g at room temperature. The highest value of coercivity of all the samples was 1368.33 Oe for the sample sintered at 900 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：133 / 138

页数：6

共 42 条

[1] Effect of Cu doped nickel ferrites on structural, magnetic and dielectric properties [J].