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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Orientational glass behaviour of K Br0.96(CN)0.04 (1981)
    Springer
    The European physical journal 42 (1981), S. 143-149 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ultrasonic measurements on the mixed crystal K Br0.96(CN)0.04 show a minimum of most of the elastic constants at 16 K. In addition we determinedc 11(T) at 10 MHz and at 50 MHz observing dispersion effects. These results and previous Brillouin and neutron scattering results of other authors on higher CN-concentrations are interpreted by an orientational glass behaviour. A semiquantitative description is given in terms of the mean random field approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01319548
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Coupled rotational and translational modes in the mixed molecular crystal KBr1−x (CN) x (1980)
    Springer
    The European physical journal 38 (1980), S. 253-262 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract TheE g andT 2g acoustic phonon modes of the molecular crystals KBr0.96(CN)0.04 and KBr0.86(CN)0.14 have been investigated by inelastic neutron scattering at 6, 90 and 300 K. Clear resonances due to mode-mode coupling to molecular excitations were observed. In complementary ultrasonic experiments the elastic constants were found to pass through minima as a function of temperature. The results were quantitavely explained by a model which assumes simple forms of the molecular excitation spectrum. An alternative interpretation, though being only qualitative, postulates a freezing of the CN molecules into a glass-like phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01315664
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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