MICROWAVE DIELECTRIC-DISPERSION IN TL(INS2)(0.985)(FESE2)(0.015)

Authors
BANYS J GRIGAS J SOBIESTIANSKAS R BRILINGAS A
Citation
J. Banys et al., MICROWAVE DIELECTRIC-DISPERSION IN TL(INS2)(0.985)(FESE2)(0.015), Ferroelectrics. Letters section, 18(5-6), 1994, pp. 209-214
Citations number
11
Categorie Soggetti
Physics, Condensed Matter
Journal title
Ferroelectrics. Letters section → ACNP
ISSN journal
07315171
Volume
18
Issue
5-6
Year of publication
1994
Pages
209 - 214
Database
ISI
SICI code
0731-5171(1994)18:5-6<209:MDIT>2.0.ZU;2-E
Abstract
This paper presents the results of an investigation of microwave diele ctric dispersion in the semiconductive ferroelectric Tl(InS2)(0.985) ( FeSe2)(0.015) in the frequency range 1 MHz to 110 GHz. Dielectric disp ersion did not give any evidence for the existence of an incommensurat e phase in these crystals. It is shown that dielectric dispersion is D ebye type in the frequency range 10(6) to 10(11) Hz and is caused by t wo relaxational soft modes. The magnitude of the activation energy for the higher frequency relaxational mode is found to be U = 0.1 eV.