Effect of high magnetic field annealing on the microstructure and magnetic properties of Co-Fe layered double hydroxide

被引：19
|
作者：
Zhang, Xiong [1 ]
Wang, Dongliang [1 ]
Zhang, Shuxia [1 ]
Ma, Yanwei [1 ]
Yang, Wensheng [2 ]
Wang, Yi [2 ]
Awaji, Satoshi [3 ]
Watanabe, Kazuo [3 ]
机构：
[1] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China
[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[3] Tohoku Univ, High Field Lab Superconducting Mat, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Co-Fe layered double hydroxide; CoFe2O4; Magnetic field annealing; Magnetic property; FERRITE;
D O I：
10.1016/j.jmmm.2010.05.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of high magnetic field (10T) on the products obtained by calcination of Co-Fe LDH precursors at different temperatures were investigated. The XRD results indicated that Fe-III substituted for Co-III in Co3O4 to yield (CoCoFeO4)-Co-II-Fe-III-O-III under the calcination of Co-Fe LDH precursors at 400 degrees C. The products obtained by magnetic field annealing at 400 degrees C had a porous plate-like morphology, whereas the products without magnetic field annealing were composed of nanoparticles. It was seen that Co Fe2O4 phase could be formed at low temperature (about 500 degrees C) under the magnetic field annealing. The grain size of products obtained by magnetic field annealing at 800 degrees C was larger than that of zeromagnetic field. It was found that the saturation magnetization was significantly enhanced after magnetic field annealing, especially at lower temperature (<= 600 degrees C). The possible reason for the effects on the microstructure and magnetic properties of products obtained by magnetic field annealingwasdiscussed. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：3023 / 3027
页数：5
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