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Critical relaxation of short range correlations in the mixed crystal Rb1-x (ND4)x D2PO4 |
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| Authors: | H. Grimm J. Martinez |
| Affiliation: | (1) Brookhaven National Laboratory, Upton, New York, USA;(2) Present address: Institut für Festkörperforschung, Kernforschungsanlage Jülich, Postfach, D-5170 Jülich, FRG;(3) Present address: Dep. Optica, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid, Spain |
| Abstract: | We have used thermal neutron scattering to investigate the possible dynamical origin of the short range correlations being typical for the glass phase of the mixed crystals Rb1–x(ND4)xD2PO4. A quasielastic spectrum has been found for these correlations on top of a very broad spectrum associated with local correlations. The temperature dependence of these spectra together with their elastic components has been determined with an energy resolution of 0.14 meV. A common freezing temperature of about 100 K is observed below which the spatial correlations stop to increase and the scattering becomes elastic within the instrumental time scale.Dedicated to K. Dransfeld on the occasion of his 60th birthday |
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