DIELECTRIC-DISPERSION IN FERROELECTRIC GLYCINE PHOSPHITE

Authors
TCHUKVINSKYI R CZAPLA Z SOBIESTIANSKAS R BRILINGAS A GRIGAS J BARAN J
Citation
R. Tchukvinskyi et al., DIELECTRIC-DISPERSION IN FERROELECTRIC GLYCINE PHOSPHITE, Acta Physica Polonica. A, 92(6), 1997, pp. 1191-1196
Citations number
13
Journal title
Acta Physica Polonica. A → ACNP
ISSN journal
05874246
Volume
92
Issue
6
Year of publication
1997
Pages
1191 - 1196
Database
ISI
SICI code
0587-4246(1997)92:6<1191:DIFGP>2.0.ZU;2-I
Abstract
Dielectric dispersion in ferroelectric hydrogen bonded glicyne phosphi te crystal was investigated in the frequency range 100 Hz - 27 GHz. Di electric relaxation of Debye type observed in the paraelectric phase s hows a critical slowing down of the polarization fluctuations. The rel axation frequency decreases with temperature according to f(s) = 0.305 (T - T-0) GHz in the paraelectric phase. The activation energy for fli pping dipole motion Delta U = 2.07kT(c) confirms order-disorder charac ter of the phase transition. In the ferroelectric phase pronounced low frequency (100 Hz - 1 MHz) dispersion related to domain contribution to permittivity was found.