BRILLOUIN-SCATTERING OF COMPACTED VITREOUS SILICA

Authors
DORING K RAU S WEISS G ARNDT J HUNKLINGER S
Citation
K. Doring et al., BRILLOUIN-SCATTERING OF COMPACTED VITREOUS SILICA, Physics letters. A, 184(6), 1994, pp. 464-466
Citations number
14
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
184
Issue
6
Year of publication
1994
Pages
464 - 466
Database
ISI
SICI code
0375-9601(1994)184:6<464:BOCVS>2.0.ZU;2-#
Abstract
Brillouin scattering experiments are performed to study the acoustic p roperties of a compacted sample of vitreous silica (a-SiO2). Compared to uncompacted a-SiO2 the mean free path of 35 GHz phonons is surprisi ngly long and depends only weakly on temperature between 50 and 300 K. The temperature variation of the sound velocity exhibits a shallow mi nimum around 100 K and thus resembles that of normal a-SiO2 on a much smaller scale.