Published July 15, 1980 | Version v1
Journal article Metadata-only

Study of the temperature dependence of the localized vibrations of H and D in niobium

Creators

  • 1. Institut fuer Festkoerperforschung, Kernforschungsanlage Juelich, 517 Juelich, Federal Republic of Germany

Description

The second harmonic of the local deuterium vibration in NbD/sub 0.85/ has been observed for the first time. Its energy hω=170 meV is 7 meV below the harmonic value of twice the lower local-mode energy, 2hω1. The measured isotope effect for the lowest local-mode energy is ω/sup H/1/ω/sup D/1=1.365 +- 0.005 which differs from the harmonic value of (M/sub D//M/sub H/)/sup 1/2/=√2. The temperature dependence of the local modes for both the deuteride and hydride system exhibit pronounced precursor effects prior to the β → α' order-disorder phase transition

Additional details

Publishing Information

Journal Title
Phys. Rev., B: Condens. Matter
Journal Volume
22
Journal Issue
2
Series
Phys. Rev., B: Condens. Matter.
Journal Page Range
599-605
ISSN
0163-1829

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
11569500
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
DEUTERIUM COMPOUNDS; NEUTRON DIFFRACTION; NIOBIUM ALLOYS; ORDER PARAMETERS; ORDER-DISORDER TRANSFORMATIONS; OSCILLATION MODES; TEMPERATURE DEPENDENCE; VIBRATIONAL STATES
Descriptors DEC
ALLOYS; COHERENT SCATTERING; DIFFRACTION; ENERGY LEVELS; EXCITED STATES; HYDROGEN COMPOUNDS; PHASE TRANSFORMATIONS; SCATTERING; TRANSITION ELEMENT ALLOYS