Study on the synthesis of NiZnCu ferrite nanoparticles by PVA sol-gel method and their magnetic properties

被引：32

作者：

Yan, Shifeng ^{[1
]}

Yin, Jingbo ^{[1
]}

Zhou, Enle ^{[2
]}

机构：

[1] Shanghai Univ Sci & Technol, Dept Polymer Mat, Sch Mat Sci & Engn, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 450卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

ferrite; sol-gel processes; Mossbauer spectroscopy; magnetic properties;

D O I：

10.1016/j.jallcom.2006.10.144

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：

Ni0.65Zn0.35Cu0.1Fe1.9O4 nanoparticles fabricated by a polyvinyl alcohol (PVA) sol-gel process have been investigated by infrared spectra (IR), X-ray diffraction (XRD), transmission electron microscope (TEM) and Mossbauer spectroscopy measurements. The particles annealed at and above 250 degrees C are single phase NiZnCu ferrite with spinel structure. Particles annealed at and above 350 degrees C behave ferri magnetically, while sample annealed at 250 degrees C is simultaneously paramagnetic and ferrimagnetic. In addition, the transition from the paramagnetic to the ferrimagnetic state can be observed in sample annealed at 250 degrees C as the measuring temperature decreases from 260 degrees C to liquid nitrogen temperature. The magnetic properties of NiZnCu ferrite nanoparticles are clearly size-dependent. The saturation magnetization increases with the annealing temperature. The coercivity of NiZnCu ferrite nanoparticles reaches a maximum when the annealing temperature is 550 degrees C. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：417 / 420

页数：4

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