CRYOGENIC DIELECTRIC-PROPERTIES OF SAPPHIRE AT 2.45 GHZ

Authors
BUCKLEY SN AGNEW P PELLS GP
Citation
Sn. Buckley et al., CRYOGENIC DIELECTRIC-PROPERTIES OF SAPPHIRE AT 2.45 GHZ, Journal of physics. D, Applied physics, 27(10), 1994, pp. 2203-2209
Citations number
18
Categorie Soggetti
Physics, Applied
Journal title
Journal of physics. D, Applied physics → ACNP
ISSN journal
00223727
Volume
27
Issue
10
Year of publication
1994
Pages
2203 - 2209
Database
ISI
SICI code
0022-3727(1994)27:10<2203:CDOSA2>2.0.ZU;2-#
Abstract
An exceptionally sensitive calorimetric technique has been devised for measuring microwave absorption by small samples of ultra-low-loss die lectrics at cryogenic temperatures. The loss factor of sapphire at 2.4 5 GHz diminished progressively with decreasing temperature from 3.5 x 10(-5) at 300 K down to 2 x 10(-10) at 4.2 K. The rate of decrease sho wed no tendency to attenuate at temperatures down to 4.2 K.