Synthesis and Magnetism of MO∙Fe2O3 (M=Co、Mn) Nanoclusters
碩士 === 國立中興大學 === 物理學系所 === 102 === In this research, we synthesis MO∙Fe2O3 (M=Co.Mn) compound by the sol-gel method. The MO∙Fe2O3 (M=Co.Mn) compound has spinel crystal structure. The particle size of the specimen and formation of the cluster are strongly dependent on the sintering temperature. The...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2014
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| Online Access: | http://ndltd.ncl.edu.tw/handle/36275687658754838096 |
| Summary: | 碩士 === 國立中興大學 === 物理學系所 === 102 === In this research, we synthesis MO∙Fe2O3 (M=Co.Mn) compound by the sol-gel method. The MO∙Fe2O3 (M=Co.Mn) compound has spinel crystal structure. The particle size of the specimen and formation of the cluster are strongly dependent on the sintering temperature. The particle size of the MO∙Fe2O3 (M=Co.Mn) compound is analyzed by the Scherrer formalism obtained from the line width of the powder x-ray diffraction pattern. In addition, the morphology of the specimen is observed by the Scanning Electron Microscopy (SEM). We obtain a consistent result as XRD. Typically, the radius of the nanoparticle is from 120 nm to 220 nm depending on the sintering temperature. As the particle size of specimen reduced to the nano-scale, the superparamagnetism phenomenon is observed that is completely different from the paramagnetic behavior observed in the bulk material.
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