Conductivity and Dielectric Relaxation Properties of Annealed Cr-Substituted Ni-Ferrite Nanoparticles

被引：5
作者：
El-Ghazzawy, E. H. [1 ]
机构：
[1] Tanta Univ, Dept Phys, Fac Sci, Tanta 31527, Egypt
来源：
JOURNAL OF ELECTRONIC MATERIALS | 2017年 / 46卷 / 10期
关键词：
NiCrxFe2-xO4; nanoferrites; DC conductivity; dielectric properties; complex impedance; MAGNETIC-PROPERTIES; ELECTRICAL-PROPERTIES; ZN FERRITES; BEHAVIOR; TEMPERATURE; FREQUENCY; MOSSBAUER; CADMIUM;
D O I：
10.1007/s11664-017-5633-3
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Nanocrystalline NiCr (x) Fe2-x O-4 spinel samples with x = 0.1 and 0.2 have been synthesized by coprecipitation method and annealed at 620A degrees C and 1175A degrees C for 4 h. Their electrical properties were investigated as functions of frequency in the range of 100 Hz to 100 kHz and temperature in the range of 308 K to 358 K. The dielectric constant () and dielectric loss factor () appeared to decrease with increasing frequency, while the alternating-current (AC) conductivity () increased. These dielectric parameters increased with increasing temperature. On the other hand, impedance spectroscopy gave Cole-Cole plots with only one semicircular arc for all the samples, indicating that the grain-boundary contribution was dominant in the conduction mechanism.
引用
收藏
页码：5599 / 5607
页数：9
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