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Hyper‐rayleigh scattering in disordered sodium nitrate
Author(s) -
Vogt H.,
Neumann G.
Publication year - 1978
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.2220860222
Subject(s) - rayleigh scattering , scattering , wavenumber , condensed matter physics , melting point , sodium nitrate , materials science , ion , ising model , phase (matter) , molecular physics , physics , optics , quantum mechanics , metallurgy
Hyper‐Rayleigh scattering is observed in single crystals of NaNO 3 when the order‐disorder phase transition point and the nearby melting temperature are approached. Besides the central line at twice the wavenumber of the exciting radiation a wing and a phonon band are found. All spectral features are due to the rotational mobility of the NO 3 − ions. The temperature dependence of the hyper‐Rayleigh intensity is interpreted in terms of an Ising model.