Published January 1985 | Version v1
Journal article Metadata-only

Experimental study of lattice dynamics in LaB6 and YbB6

Creators

  • 1. Oak Ridge National Lab., TN (USA)
  • 2. Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs.
  • 3. Tohoku Univ., Sendai (Japan). Dept. of Physics
  • 4. Tohoku Univ., Sendai (Japan). Research Inst. for Scientific Measurements

Description

Lattice dynamics of La11B6 was studied on the neutron triple axis spectrometers at HFIR. The acoustic and optical modes were measured in the high symmetry directions. The rotary motion of the B6 molecule was measured only near the zone boundaries but shows no softening. Instead, very flat low frequency La modes were observed. The agreement with the elastic constants and the temperature dependence of specific heat is satisfactory. In YbB6, the elastic constants and the specific heat were measured. Both results give the quite different feature from those of LaB6, no softening of C12 and more softened flat low frequency Yb modes, due to the lack of the metallic bonds. (author)

Additional details

Publishing Information

Journal Title
Solid State Commun.
Journal Volume
53
Journal Issue
1
Series
Solid State Commun.
Journal Page Range
15-19
ISSN
0038-1098

INIS

Country of Publication
United Kingdom
Country of Input or Organization
United Kingdom
INIS RN
16033887
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CRYSTAL LATTICES; DISPERSION RELATIONS; ELASTICITY; INELASTIC SCATTERING; LANTHANUM BORIDES; NEUTRONS; OPTICAL MODES; PHONONS; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; YTTERBIUM BORIDES
Descriptors DEC
BARYONS; BORIDES; BORON COMPOUNDS; CRYSTAL STRUCTURE; ELEMENTARY PARTICLES; FERMIONS; HADRONS; LANTHANUM COMPOUNDS; MECHANICAL PROPERTIES; NUCLEONS; OSCILLATION MODES; PHYSICAL PROPERTIES; QUASI PARTICLES; RARE EARTH COMPOUNDS; SCATTERING; THERMODYNAMIC PROPERTIES; YTTERBIUM COMPOUNDS