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Electrical conduction in ferroelectric lead hydrogen phosphate single crystals
Author(s) -
Desai C. C.,
Ramana M. S. V.
Publication year - 1987
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/crat.2170220614
Subject(s) - electrical resistivity and conductivity , ferroelectricity , activation energy , thermal conduction , conductivity , materials science , diffusion , paramagnetism , hydrogen , analytical chemistry (journal) , pellet , phase (matter) , atmospheric temperature range , inorganic chemistry , chemistry , dielectric , condensed matter physics , thermodynamics , optoelectronics , composite material , electrical engineering , engineering , physics , organic chemistry , chromatography
Single crystals of LHP (Lead Hydrogen Phosphate) have been grown using the controlled reaction between lead nitrate and orthophosphoric acid solution by diffusion process in silica gel medium. Transparent crystals upto 6 × 4 × 3 mm 3 in size have been grown at room temperature. The d.c. electrical conductivity of both single crystals and pelletized samples of LHP have been studied in the temperature range from 313 to 968 K. It has been observed that: (i) the d.c. conductivity of the crystalline sample is greater than that of thepellet sample, (ii) three distinct electrical conductivity processes have been observed and are interpreted as extrinsic, intrinsic, phase changes, and (iii) the activation energy for the conduction in the crystalline sample is greater than that of the pellet sample. The magnetic susceptibility measurements reveal that the paramagnetic characteristic of these materials and the implications are discussed.