A Neutron Scattering Study of Phonons in Per-Deuterated S-Triazine

M. T. Doue, I. U. Heilmann, Jørgen Kjems, J. Kurittu, C. S. Pawley

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The lattice dynamics of a fully-deuterated single crystal of s-triazine is investigated using the technique of coherent inelastic neutron scattering. Detailed measurements of the temperature dependence of the dispersion of the soft acoustic mode associated with the ferroelastic phase transition are reported and compared with the qualitative behavior of other acoustic modes. The results are in agreement with an analysis of the acoustic dynamical matrix for this material which predicts that in the high-temperature phase the combination of elastic constants C//e//f//f**2 equals one-half (C//1//1 minus C//1//2) C//4//4 minus C//1//4**2 should become unstable on cooling towards the transition temperature.
    Original languageEnglish
    JournalIPPS physica status solidi (b)
    Volume120
    Issue number1
    Pages (from-to)173-181
    ISSN0370-1972
    Publication statusPublished - 1983

    Fingerprint Dive into the research topics of 'A Neutron Scattering Study of Phonons in Per-Deuterated S-Triazine'. Together they form a unique fingerprint.

    Cite this