NEUTRON-SCATTERING STUDY OF DCN

Gordon A. Mackenzie, G. S. Pawley

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Phonons in deuterium cyanide have been measured by neutron coherent inelastic scattering. The main subject of study was the transverse acoustic mode in the (110) direction polarised along (110) which is associated with the first-order structural phase transition at 160K. Measurements have shown that the frequency decreases by about 25% between about 225 and 160K as the transition temperature is approached. The other acoustic modes observable in the a*b* scattering plane have been measured and show no anomalous temperature dependence. Optic modes were unobservable because of the small size of the single-crystal sample which gave insufficient scattered intensity. Apart from the 'soft' mode, the measured frequencies are in good agreement with lattice dynamics calculations.
    Original languageEnglish
    JournalJOURNAL OF PHYSICS C-SOLID STATE PHYSICS
    Volume12
    Issue number14
    Pages (from-to)2717-2735
    ISSN0022-3719
    DOIs
    Publication statusPublished - 1979

    Fingerprint Dive into the research topics of 'NEUTRON-SCATTERING STUDY OF DCN'. Together they form a unique fingerprint.

    Cite this