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DC and AC Conductivity of Barium Hydrogen Phosphate (BaHPO 4 )
Author(s) -
Trivedi T.R.,
Oza A.T.,
Patel V.A.,
Arora S.K.
Publication year - 2000
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/1521-4079(200005)35:5<615::aid-crat615>3.0.co;2-5
Subject(s) - barium , conductivity , thermal conduction , dielectric , condensed matter physics , electrical resistivity and conductivity , semiconductor , hydrogen , ion , materials science , chemistry , ferroelectricity , exponential function , analytical chemistry (journal) , inorganic chemistry , physics , optoelectronics , mathematical analysis , mathematics , organic chemistry , chromatography , quantum mechanics , composite material
Abstract D.C. conductivity of the ferroelectric BaHPO 4 is measured and is found to lie between usual conductivities of semiconductor and insulator. Its temperature dependence shows intrinsic conduction in defective crystals due to H + ions. The a.c. conductivity calculated from the measured dielectric constant follows σ˜ω 1.54 , a power law. Frequency of 20 kHz resolves the resistivity peak of a.c. conduction into two Gaussians. The ln sigma vs f plots at different temperatures show an exponential dependence and existence of a focal point.