Journal: MRS Proceedings

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Materials Research Society

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Publications 1 - 2 of 2
  • Phononic quasicrystals
    Item type: Conference Paper
    Sutter, Daniel; Krauss, Günter; Steurer, Walter (2004)
    MRS Proceedings ~ Quasicrystals 2003 - Preparation, Properties and Applications
  • Debye temperature at the fivefold- and threefold-symmetry surface of the Al-Pd-Mn quasicrystal
    Item type: Conference Paper
    Lüscher, Rouven; Flückiger, Thomas; Erbudak, Mehmet; et al. (2004)
    MRS Proceedings ~ Quasicrystals 2003 - Preparation, Properties and Applications
    Specular-beam intensity profiles are measured in low-energy electron diffraction as a function of temperature for the fivefold- and threefold-symmetry surfaces of the icosahedral quasicrystal Al-Pd-Mn. The resulting shifts of the Bragg-peaks to lower energies are accounted for mainly by a lattice expansion perpendicular to the surface and allow us to determine the thermal expansion coefficient of atomic layers to be (24.5 ± 2.0) × 10-6 K -1 for both surfaces. As a result of several measurements, a surface Debye temperature of 298 ± 7 K is found for the pentagonal and 301 ± 10 K for the threefold-symmetry surface. This similarity implies comparable bonding forces for the atoms at these surfaces. Additionally, the derived thermal expansion coefficient supports a layer-based structural model for both surfaces investigated here.
Publications 1 - 2 of 2