Author/Authors :
Bottani، نويسنده , , C.E. and Li Bassi، نويسنده , , A. and Tanner، نويسنده , , B.K. and Stella، نويسنده , , A. and Tognini، نويسنده , , P. and Cheyssac، نويسنده , , P. and Kofman، نويسنده , , R.، نويسنده ,
Abstract :
The abrupt change of velocity in surface acoustic waves in thin films of amorphous SiOx containing nanometre scale β-Sn crystals has been shown to be directly associated with the size-dependent melting of the nanoparticles. Effective medium theory has been used to explain the origin and the magnitude of the anomaly. A central peak in the Brillouin spectrum, whose intensity showed a maximum at the melting temperature, can be interpreted in terms of overdamped fluctuations in the dielectric function.
