NEUTRON-SCATTERING STUDY OF DCN

Gordon A. Mackenzie; G. S. Pawley

doi:10.1088/0022-3719/12/14/011

NEUTRON-SCATTERING STUDY OF DCN

Gordon A. Mackenzie, G. S. Pawley

Research output: Contribution to journal › Journal article › Research › peer-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 language	English
Journal	Journal of Physics C: Solid State Physics
Volume	12
Issue number	14
Pages (from-to)	2717-2735
ISSN	0022-3719
DOIs	https://doi.org/10.1088/0022-3719/12/14/011
Publication status	Published - 1979

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title = "NEUTRON-SCATTERING STUDY OF DCN",

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.",

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year = "1979",

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T1 - NEUTRON-SCATTERING STUDY OF DCN

AU - Mackenzie, Gordon A.

AU - Pawley, G. S.

PY - 1979

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N2 - 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.

AB - 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.

U2 - 10.1088/0022-3719/12/14/011

DO - 10.1088/0022-3719/12/14/011

M3 - Journal article

SN - 0022-3719

VL - 12

SP - 2717

EP - 2735

JO - Journal of Physics C: Solid State Physics

JF - Journal of Physics C: Solid State Physics

IS - 14

ER -

NEUTRON-SCATTERING STUDY OF DCN

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