Structural, dielectric and magnetic properties of NiFe2O4 prepared via sol-gel auto-combustion method

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:421

Article

Sun, Li^1,2  Zhang, Ru²  Wang, Zhenduo²  Ju, Lin³  Cao, Ensi²  Zhang, Yongjia² 

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

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

[3] Anyang Normal Univ, Coll Phys & Elect Engn, Anyang 455000, Peoples R China

关键词: NiFe2O4;    Sol-gel Auto-combustion method;    Ferrites;    Soft magnets;    Magnetic properties;   

DOI  :  10.1016/j.jmmm.2016.08.003

来源: Elsevier

【 摘 要 】

Nickelferrite (NiFe2O4)powders were synthesized via sol-gel auto-combustion method and the corresponding temperature dependence of microstructure, dielectric and magnetic properties have been investigated. Results of XRD and SEM indicate that the NiFe2O4 samples exhibit a typical single phase spinel structure and a uniform particle distribution. The dielectric constant and dielectric loss measurements show strong frequency dependence of all the samples. The peak observed in frequency dependence of dielectric loss measurements shifts to higher frequency with the increasing sintering temperature, indicating a Debye-like dielectric relaxation. The remanent magnetization increases with the increasing grain size while the coercivity is just the opposite. The saturation magnetization can achieve 50 emu/g when the sintering temperature is more than 1000 degrees C, and the lowest coercivity (159.49 Oe) was observed in the NFO sample sintered at 1300 degrees C for 2 h. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free