TY - JOUR
T1 - Effect of high magnetic field annealing on the microstructure and magnetic properties of CoFe layered double hydroxide
AU - Zhang, Xiong
AU - Wang, Dongliang
AU - Zhang, Shuxia
AU - Ma, Yanwei
AU - Yang, Wensheng
AU - Wang, Yi
AU - Awaji, Satoshi
AU - Watanabe, Kazuo
N1 - Funding Information:
The work was supported by the National Natural Science Foundation of China (Grant no. 50777062 ) and the Director Foundation of IEE.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2010/10
Y1 - 2010/10
N2 - The effects of high magnetic field (10 T) on the products obtained by calcination of CoFe LDH precursors at different temperatures were investigated. The XRD results indicated that FeIII substituted for CoIII in Co3O4 to yield CoIICoIIIFe IIIO4 under the calcination of CoFe LDH precursors at 400 °C. The products obtained by magnetic field annealing at 400 °C had a porous plate-like morphology, whereas the products without magnetic field annealing were composed of nanoparticles. It was seen that CoFe 2O4 phase could be formed at low temperature (about 500 °C) under the magnetic field annealing. The grain size of products obtained by magnetic field annealing at 800 °C was larger than that of zero magnetic field. It was found that the saturation magnetization was significantly enhanced after magnetic field annealing, especially at lower temperature (≤600 °C). The possible reason for the effects on the microstructure and magnetic properties of products obtained by magnetic field annealing was discussed.
AB - The effects of high magnetic field (10 T) on the products obtained by calcination of CoFe LDH precursors at different temperatures were investigated. The XRD results indicated that FeIII substituted for CoIII in Co3O4 to yield CoIICoIIIFe IIIO4 under the calcination of CoFe LDH precursors at 400 °C. The products obtained by magnetic field annealing at 400 °C had a porous plate-like morphology, whereas the products without magnetic field annealing were composed of nanoparticles. It was seen that CoFe 2O4 phase could be formed at low temperature (about 500 °C) under the magnetic field annealing. The grain size of products obtained by magnetic field annealing at 800 °C was larger than that of zero magnetic field. It was found that the saturation magnetization was significantly enhanced after magnetic field annealing, especially at lower temperature (≤600 °C). The possible reason for the effects on the microstructure and magnetic properties of products obtained by magnetic field annealing was discussed.
KW - CoFe layered double hydroxide
KW - CoFeO
KW - Magnetic field annealing
KW - Magnetic property
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U2 - 10.1016/j.jmmm.2010.05.023
DO - 10.1016/j.jmmm.2010.05.023
M3 - Article
AN - SCOPUS:77955307760
VL - 322
SP - 3023
EP - 3027
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 20
ER -