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Far‐infrared reflectivity spectra of ammonium dihydrogen phosphate in the para‐ and antiferroelectric phases
Author(s) -
Wyncke B.,
Brehat F.,
Arbouz H.
Publication year - 1986
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.2221340210
Subject(s) - antiferroelectricity , ammonium dihydrogen phosphate , crystal (programming language) , reflectivity , infrared spectroscopy , infrared , phase (matter) , phase transition , spectral line , phosphate , materials science , crystallography , ammonium phosphate , atmospheric temperature range , ammonium , analytical chemistry (journal) , chemistry , optics , ferroelectricity , condensed matter physics , optoelectronics , dielectric , physics , thermodynamics , organic chemistry , fertilizer , astronomy , computer science , programming language
For the first time complete data are given on far‐infrared reflectivity spectra of an ammonium dihydrogen phosphate single crystal in the temperature range 7 to 300 K, over the spectral region 15 to 400 cm −1 , and for all crystallographic orientations of the crystal, in the para‐ and antiferroelectric phase. This study shows that although the crystal shatters when cooling through the phase transition, it preserves its crystallographic properties.