Growth of monodisperse nanospheres of MnFe2O4 with enhanced magnetic and optical properties

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	Growth of monodisperse nanospheres of MnFe2O4 with enhanced magnetic and optical properties
其他题名	Growth of monodisperse nanospheres of MnFe_2O_4 with enhanced magnetic and optical properties
	Rafique M Yasir 1; Pan LiQing 1; Javed Quratulain 3; Iqbal M Zubair 3; Qiu HongMei 3; Farooq M Hassan 4; Guo ZhenGang 3; Tanveer M 5
	2013
发表期刊	CHINESE PHYSICS B
ISSN	1674-1056
卷号	22 期号:10
摘要	Highly dispersive nanospheres of MnFe2O4 are prepared by template free hydrothermal method. The nanospheres have 47.3-nm average diameter, narrow size distribution, and good crystallinity with average crystallite size about 22 nm. The reaction temperature strongly affects the morphology, and high temperature is found to be responsible for growth of uniform nanospheres. Raman spectroscopy reveals high purity of prepared nanospheres. High saturation magnetization (78.3 emu/g), low coercivity (45 Oe, 1 Oe = 79.5775 A.cm(-1)), low remanence (5.32 emu/g), and high anisotropy constant 2.84 x 10(4) J/m(3) (10 times larger than bulk) are observed at room temperatures. The nearly superparamagnetic behavior is due to comparable size of nanospheres with superparamagnetic critical diameter D-cr(spm). The high value of K-eff may be due to coupling between the pinned moment in the amorphous shell and the magnetic moment in the core of the nanospheres. The nanospheres show prominent optical absorption in the visible region, and the indirect band gap is estimated to be 0.98 eV from the transmission spectrum. The prepared Mn ferrite has potential applications in biomedicine and photocatalysis.
其他摘要	Highly dispersive nanospheres of MnFe_2O_4 are prepared by template free hydrothermal method. The nanospheres have 47.3-nm average diameter, narrow size distribution, and good crystallinity with average crystallite size about 22 nm. The reaction temperature strongly affects the morphology, and high temperature is found to be responsible for growth of uniform nanospheres. Raman spectroscopy reveals high purity of prepared nanospheres. High saturation magnetization (78.3 emu/g), low coercivity (45 Oe, 1 Oe=79.5775 A·cm~(-1)), low remanence (5.32 emu/g), and high anisotropy constant 2.84×10~4 J/m~3 (10 times larger than bulk) are observed at room temperatures. The nearly superparamagnetic behavior is due to comparable size of nanospheres with superparamagnetic critical diameter D_(cr)~(spm). The high value of K_(eff) may be due to coupling between the pinned moment in the amorphous shell and the magnetic moment in the core of the nanospheres. The nanospheres show prominent optical absorption in the visible region, and the indirect band gap is estimated to be 0.98 eV from the transmission spectrum. The prepared Mn ferrite has potential applications in biomedicine and photocatalysis.
关键词	MANGANESE FERRITE SOLVOTHERMAL SYNTHESIS NANOPARTICLES SIZE MN FUNCTIONALIZATION ANISOTROPY NANORODS SPHERES FACILE Mn ferrite magnetic materials hydrothermal method superparamagnetic Raman spectroscopy
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Beijing Natural Science Foundation] ; [Research Foundation for Talented Scholars of China Three Gorges University] ; [University of Science and Technology of Beijing]
CSCD记录号	CSCD:4952351
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/151575
专题	中国科学院金属研究所
作者单位	1.三峡大学 2.China Three Gorges Univ, Res Institute New Energy, Yichang 443002, Peoples R China 3.中国科学院植物研究所 4.中国科学技术大学 5.中国科学院金属研究所
推荐引用方式 GB/T 7714	Rafique M Yasir,Pan LiQing,Javed Quratulain,et al. Growth of monodisperse nanospheres of MnFe2O4 with enhanced magnetic and optical properties[J]. CHINESE PHYSICS B,2013,22(10).
APA	Rafique M Yasir.,Pan LiQing.,Javed Quratulain.,Iqbal M Zubair.,Qiu HongMei.,...&Tanveer M.(2013).Growth of monodisperse nanospheres of MnFe2O4 with enhanced magnetic and optical properties.CHINESE PHYSICS B,22(10).
MLA	Rafique M Yasir,et al."Growth of monodisperse nanospheres of MnFe2O4 with enhanced magnetic and optical properties".CHINESE PHYSICS B 22.10(2013).