6533b7d1fe1ef96bd125caa7
RESEARCH PRODUCT
Inelastic and quasi-elastic light scattering in (NaCN)1?x(KCN)x quadrupolar glasses
Rudolf FeileJean-françois Berretsubject
Couplingchemistry.chemical_classificationMaterials scienceBrillouin SpectroscopyCondensed matter physicsbusiness.industryPhononAttenuationNeutron scatteringAtmospheric temperature rangeCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsOpticschemistryDispersion (optics)General Materials SciencebusinessInorganic compounddescription
The elastic constantsc11 andc44, and the attenuation of longitudinal phonons along (100)-direction in (NaCN)1−x(KCN)x mixed crystals have been determined by brillouin spectroscopy in the temperature range fromT=10K−300K. Minima inc44 (T) which determine the freezing tempratureTF in these orientational glasses appear at lower temperatures compared to neutron scattering results. The coupling of molecular reorientations to longitudinal phonons in NaCN-rich smaples shows up in dispersion effects inc11 (T) and the appearence of a dynamical central peak nearTF.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-06-01 | Zeitschrift f�r Physik B Condensed Matter |