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Pyroelectric Effect, Optical Birefringence, and Non‐Linear Dielectric Constant in Betaine Arsenate
Author(s) -
LacèrdaAroso M. T.,
Ribeiro J. L.,
Chaves M. R.,
Almeida A.,
Vieira L. G.,
Klöpperpieper A.,
Albers J.
Publication year - 1994
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.2221850123
Subject(s) - pyroelectricity , birefringence , arsenate , dielectric , betaine , ferroelectricity , materials science , phase transition , polarization (electrochemistry) , linear relationship , analytical chemistry (journal) , condensed matter physics , optics , chemistry , optoelectronics , physics , arsenic , chromatography , organic chemistry , mathematics , statistics , metallurgy
Detailed measurements of the pyroelectric coefficient and optical birefringence in betaine arsenate, in a temperature range centred at the ferroelectric phase transition ( T c2 ≈ 121 K) are reported. The critical behaviour of the spontaneous polarization is analyzed from these data and a cross‐over between two different critical regimes is evidenced. Results of linear and non‐linear dielectric constant measured along [001] are also reported.