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Electrical Properties of Alkaline Earth Fluorohalide Crystals
Author(s) -
Ayachour D.,
Sieskind M.,
Geist P.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221660105
Subject(s) - dielectric , antiferroelectricity , ionic bonding , materials science , dipole , alkaline earth metal , vacancy defect , ion , activation energy , ionic conductivity , condensed matter physics , schottky diode , chemistry , ferroelectricity , optoelectronics , physics , electrode , electrolyte , organic chemistry , diode , metal , metallurgy
The ionic conductivity of undoped BaFCl, BaFBr, BaFI, SrFCl, and SrFBr single crystals is measured. The activation energies for a variety of anion vacancy mechanisms and the Schottky energy are defined. They are found to be in good agreement with Baetzold's theoretical data. Partial measurements of the static dielectric constant point out that these materials show an important dipolar contribution which is connected with their antiferroelectric character.