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Temperature Dependence of Optical Absorption near the Structural Phase Transition of Potassium Nitrate
Author(s) -
Kawashima R.,
Katsuki K.,
Suzuki K.
Publication year - 1985
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.2221290230
Subject(s) - phase transition , potassium nitrate , spectral line , absorption spectroscopy , dielectric , absorption (acoustics) , potassium , exponential decay , transition point , ultraviolet , crystal (programming language) , lattice constant , lattice (music) , chemistry , phase (matter) , analytical chemistry (journal) , condensed matter physics , materials science , thermodynamics , optics , physics , organic chemistry , chromatography , optoelectronics , astronomy , computer science , nuclear physics , diffraction , acoustics , composite material , programming language
The electronic properties of a KNO 3 crystal near the structural phase transition are investigated by observing ultraviolet absorption spectra. The spectra show an anomalous temperature dependence near the transition point T tr . The anomalous behaviour of the exponential absorption tails in the spectra is observed and discussed phenomenologically in relation to anomalies in the dielectric constant and lattice constant of KNO 3 .