| Growth of monodisperse nanospheres of MnFe2O4 with enhanced magnetic and optical properties | |
| Alternative Title | Growth of monodisperse nanospheres of MnFe_2O_4 with enhanced magnetic and optical properties |
| Rafique M Yasir1; Pan LiQing1; Javed Quratulain3; Iqbal M Zubair3; Qiu HongMei3; Farooq M Hassan4; Guo ZhenGang3; Tanveer M5 | |
| 2013 | |
| Source Publication | CHINESE PHYSICS B
 |
| ISSN | 1674-1056 |
| Volume | 22Issue:10 |
| Abstract | 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. |
| Other Abstract | 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. |
| Keyword | MANGANESE FERRITE SOLVOTHERMAL SYNTHESIS NANOPARTICLES SIZE MN FUNCTIONALIZATION ANISOTROPY NANORODS SPHERES FACILE Mn ferrite magnetic materials hydrothermal method superparamagnetic Raman spectroscopy |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [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 ID | CSCD:4952351 |
| Citation statistics |
Cited Times:1[CSCD]
[CSCD Record]
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| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/151575 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 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 |
| Recommended Citation 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). |
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