Dielectric relaxation of Ni0.5Zn0.5Fe2O4 ceramics

被引：19
|
作者：
Chen, D. G. [1 ]
Tang, X. G. [1 ]
Tong, J. J. [1 ]
Wu, J. B. [1 ]
Jiang, Y. P. [1 ]
Liu, Q. X. [1 ]
机构：
[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 14-15期
基金：
中国国家自然科学基金;
关键词：
Magnetic materials; Co-precipitation processing; Relaxation behavior; Ferromagnetic properties; NI-ZN FERRITES; MICROSTRUCTURE CHARACTERIZATION; ELECTRICAL-PROPERTIES; MAGNETIC-PROPERTIES; RIETVELDS ANALYSIS; ZINC FERRITE; TEMPERATURE; BEHAVIOR; NIFE2O4; SPINEL;
D O I：
10.1016/j.ssc.2011.04.016
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Nickel zinc ferrite Ni0.5Zn0.5Fe2O4 (NZFO) ceramics were prepared by the co-precipitation method. The temperature dependence of dielectric permittivity of the samples has been investigated over a broad temperature range at selected frequencies. An extremely remarkable dielectric relaxation behavior was observed with its degree of relaxation Delta T-m similar to 155 K, which was deciphered in detail by an effect between n-type and p-type carriers with temperature rising. Further studying the relaxation mechanism by employing the Arrhenius equation, two activation energy values of similar to 0.52 and 0.30 eV in different temperature regions were calculated, respectively. Furthermore, the superparamagnetic property was observed in the magnetic hysteresis loop. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1042 / 1044
页数：3
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