AN ABNORMAL BEHAVIOR OF NANO-CRYSTALLINE IN SiO2 SUBSTRATE

AN ABNORMAL BEHAVIOR OF NANO-CRYSTALLINE IN SiO₂ SUBSTRATE

Zhang Guilin，

Liu Wenhong，

Xu Feng，

Hu Wenxiang

Nuclear Science and Techniques

Vol.05, No.01

pp.35-38

Published in print 01 Feb 1994

30800

Temperature dependence of the hyperfine field of Fe nanocrystalline in SiO₂ matrix prepared by using an ion implantation and subsequent heat treatment can not be described by a formula for the isolated Fe nanocrystalline. The large stresses or chemical bond force to which interface atoms may be subjected lead to increase effective anisotropic constant. In addition a little concentration of oxygen atoms contained in the crystalline might enhance the hyperfine field.

Mossbauer spectroscopyIon implantation57Fe nano-crystallineSiO2 substrate

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