Inelastic x-ray scattering from polycrystalline materials at low momentum transfer

Journal Article · Thu Feb 01 00:00:00 EST 2007 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.75.064106· OSTI ID:20976684

Bosak, Alexey; Krisch, Michael; Fischer, Irmengard; Huotari, Simo; Monaco, Giulio ^[1]

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1. European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex (France)

The inelastic x-ray scattering from polycrystalline materials at low momentum transfer is analyzed with respect to the orientation-averaged acoustic phonon dispersion and the relationship between the derived sound velocities and their corresponding macroscopic entities. The effect of texturing on the sound dispersion is discussed and illustrated using the examples of hcp cobalt and hexagonal graphite. Our theoretical considerations are supported by experimental results and emphasize the importance to carefully consider the effects of elastic anisotropy when data obtained by inelastic x-ray scattering are compared or confronted with macroscopic measurements.

• OSTI ID: 20976684
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevB.75.064106; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COBALT
DISPERSION RELATIONS
DISPERSIONS
GRAPHITE
HCP LATTICES
MOMENTUM TRANSFER
PHONONS
POLYCRYSTALS
SOUND WAVES
VELOCITY
X-RAY DIFFRACTION