The surfactant influence on the surface magnetic properties of Fe3O4 microcrystals
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Mössbauer measurements, electron microscopy and infrared spectroscopy, have been used for investigating the Fe3O4 microcrystals coated with different surfactants. The experimental results show that the surface condition of the system changes and the anisotropy energy constantK of Fe3O4 microcrystals increases effectively when the surfactants being added. The spin pinning effect on a sample surface was observed and the pinning depth and the pinning direction were estimated. Besides, it has been shown that the anisotropy energy constantK of the coated Fe3O4 has an abrupt change nearbyTv.
KeywordsSpectroscopy Microscopy Electron Microscopy Surfactant Thin Film
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- Z. Hu, X.L. Yang, R.C. Liu, X.S. Chen, Y.H. He and Y.F. Hsia, to be published.Google Scholar