Hydrogen local modes and phonon dispersion in LuD/sub 0. 19/ and Lu

Journal Article · Tue Nov 15 04:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.9612· OSTI ID:6749960

Blaschko, O; Krexner, G; Pintschovius, L; Vajda, P; Daou, J N

The phonon dispersion of both pure Lu and ..cap alpha..-LuD/sub 0.19/ is determined along the symmetry directions GAMMA-A and GAMMA-K-M. The phonon energies are partly found to increase due to hydrogen absorption. At low temperatures no influence of deuterium ordering on the phonon frequencies can be detected. Furthermore, the hydrogen local-mode properties are investigated in ..cap alpha..-LuD/sub 0.19/. In accordance with recent results on ..cap alpha..-YH(D)/sub 0.18/, the potential at the hydrogen site is found to be very anisotropic.

• Research Organization: Institut fuer Experimentalphysik der Universitaet Wien, Strudlhofgasse 4, A-1090 Wien, Austria
• OSTI ID: 6749960
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:14; ISSN PRBMD
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360202 -- Ceramics
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ADSORPTION
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COHERENT SCATTERING
CORRELATIONS
DEUTERIDES
DEUTERIUM COMPOUNDS
DIFFRACTION
ELEMENTS
HYDROGEN
HYDROGEN COMPOUNDS
LATTICE VIBRATIONS
LUTETIUM
LUTETIUM COMPOUNDS
MEDIUM TEMPERATURE
METALS
NEUTRON DIFFRACTION
NONMETALS
PHASE STUDIES
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QUASI PARTICLES
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RARE EARTHS
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SORPTION