Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834247 | Journal of Magnetism and Magnetic Materials | 2005 | 4 Pages |
Abstract
The formation of iron and copper nano-clusters in crystalline SiO2 by sequential implantations of Fe and Cu ions was studied. The implantation was performed at room temperature to a total dose of 1.9Ã1019Â ions/cm2. The addition of Cu ions was done by a dose of 0.7Ã1017Â Cu ions/cm2. It is shown by the measurements of conversion electron Mössbauer spectroscopy and X-ray diffraction that the addition of Cu ions promotes the transitions from superparamagnetic to ferromagnetic states in the iron nano-clusters aggregated beforehand.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
N. Hayashia, I. Sakamoto, T. Moriwaki, H. Wakabayashi, T. Toriyama,