Title: Temperature and frequency dependence of the ultrasound velocity in neutron-irradiated quartz crystals above 5 K
Authors: Parchine, Mikhail
Laermans, Christiane #
Issue Date: 2004
Publisher: Kluwer academic/plenum publ
Series Title: Journal of Low Temperature Physics vol:137 issue:3-4 pages:319-334
Abstract: Neutron-irradiated quartz crystal is one of the interesting materials for the study of the glassy dynamics. The temperature and frequency dependence of the sound velocity in amorphous materials at temperatures above the low-temperature maximum is not well understood. In this paper we present the results of our measurements of the variation of the ultrasound velocity (270 - 650 MHz) in neutron-irradiated quartz crystals with different irradiation doses in temperature range 5 - 35 K. We have found that the temperature dependence of the ultrasound velocity is linear in the, sample with a dose < 10(19) n/cm(2) and is sublinear in samples with a dose > 10(19) n/cm(2). We discuss our results in the framework of the different theoretical approaches.
ISSN: 0022-2291
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Semiconductor Physics Section
# (joint) last author

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