Electric field dependent microwave losses in KTaO3 single crystal with YBa2Cu3O7-x electrodes

Authors
Carlsson, E Wikborg, E Gevorgian, S
Citation
E. Carlsson et al., Electric field dependent microwave losses in KTaO3 single crystal with YBa2Cu3O7-x electrodes, FERROELEC L, 25(5-6), 1999, pp. 141-152
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
FERROELECTRICS LETTERS SECTION
ISSN journal
07315171 → ACNP
Volume
25
Issue
5-6
Year of publication
1999
Pages
141 - 152
Database
ISI
SICI code
0731-5171(1999)25:5-6<141:EFDMLI>2.0.ZU;2-N
Abstract
We have measured the voltage dependence of the resonant frequency and the m icrowave losses for parallel-plate resonators based on single crystals KTaO 3 with YBa2Cu3O7-x electrodes. The losses increase and the dielectric const ant decrease monotonically with applied voltage. Both the dielectric consta nt and the losses show a hysteretic effect in the voltage dependence. The h ysteretic effects may be explained by electric field assisted charge trappi ng both in the KTaO3 crystal and at the KTaO3/YBa(2)Cu(3)O7(-x) interfaces.