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Dynamical properties of crystals of Sr(NO 3 ) 2 , Ba(NO 3 ) 2 , and Pb(NO 3 ) 2 . II. Temperature dependence of the infrared spectra
Author(s) -
Bon A. M.,
Benoit C.,
Giordano J.
Publication year - 1976
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.2220780203
Subject(s) - strontium , dispersion (optics) , infrared , infrared spectroscopy , spectral line , barium , analytical chemistry (journal) , nitrate , crystal (programming language) , anomaly (physics) , dispersion relation , materials science , strontium barium niobate , mineralogy , chemistry , condensed matter physics , inorganic chemistry , optics , physics , dielectric , environmental chemistry , optoelectronics , organic chemistry , astronomy , computer science , ferroelectricity , programming language
Reflective infrared spectra of three single crystals of strontium nitrate, barium nitrate, and lead nitrate are investigated between 10 and 3500 cm −1 at temperatures from 10 to 293 K. The temperature behaviour of the dispersion parameters, frequencies, strengths, and damping obtained from classical dispersion relation is analyzed in order to compare, first the miscellaneous modes of the same crystal and then of different crystals. The case of Sr(NO 3 ) 2 which presents an anomaly in the infrared spectra corresponding to a phase transition is studied in more depth.