NMR investigations of dynamical processes in orientationally ordered and disordered NaCN, RbCN and CsCN View Full Text


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Article Info

DATE

1983-03

AUTHORS

S. Elschner, J. Petersson

ABSTRACT

The nuclear spin lattice relaxation timeT1 of the23Na,85Rb,87Rb,133Cs,14N nuclei is measured in NaCN, RbCN and CsCN as a function of temperature below and above the ferroelastic phase transition temperatureTc. BelowTc the behaviour ofT1 of the alkali nuclei renders possible to determine the flip frequency of the CN molecules and its temperature dependence. AboveTc from the14NT1 the correlation time τc of the rotational motions of the CN molecules and its temperature dependence is determined. An empirical rule is verified demonstrating that atTc the correlation times take nearly the same values for all cyanides. For the high and low temperature phases one obtains atTc about τc=5·10−13s and τc=5·10−11s, respectively. The results are discussed with respect to the mechanism of the phase transition. More... »

PAGES

37-44

References to SciGraph publications

  • 1979. Phonon Dispersion Relations in Insulators in NONE
  • 1982-09. Dielectric properties of (KBr)1−x(KCN)x in ZEITSCHRIFT FÜR PHYSIK B CONDENSED MATTER
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    http://scigraph.springernature.com/pub.10.1007/bf01305896

    DOI

    http://dx.doi.org/10.1007/bf01305896

    DIMENSIONS

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