DIELECTRIC-PROPERTIES AND ELECTRIC-CONDUCTIVITY OF DIMETHYLAMMONIUM TETRACHLORCOBALTATE FERROELECTRIC-CRYSTALS

Authors
KAPUSTIANIK VB SVELEBA SA TCHUKVINSKYI R KORCHAK Y MOKRYI V POLOVINKO II TRYBULA Z
Citation
Vb. Kapustianik et al., DIELECTRIC-PROPERTIES AND ELECTRIC-CONDUCTIVITY OF DIMETHYLAMMONIUM TETRACHLORCOBALTATE FERROELECTRIC-CRYSTALS, Physica status solidi. a, Applied research, 151(2), 1995, pp. 481-488
Citations number
12
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. a, Applied research → ACNP
ISSN journal
00318965
Volume
151
Issue
2
Year of publication
1995
Pages
481 - 488
Database
ISI
SICI code
0031-8965(1995)151:2<481:DAEODT>2.0.ZU;2-D
Abstract
The dielectric parameters and electric conductivity of (NH2(CH3)(2))(2 )CoCl4 crystals are investigated. Existence of the ferroelectric phase was observed below T-c = 258 K. The occurrence of phase transitions a t 244, 314, and 435 K is confirmed. The investigated crystals also man ifest anomalously high conductivity commensurate with that in semicond uctors. Its value as well as region of existence strongly depend on th e preceding history of the sample. It is shown that the anomalous cond uctivity is connected with translocation of protons which participate in the formation of hydrogen bonds.