Publications in Scientific Journals:
K. Hense, E. Gratz, A. Lindbaum, H. Michor, H. Nowotny, F. Güthoff, A. Hoser, P. Knoll:
"Lattice dynamics of YCu2";
Journal of Alloys and Compounds,
Lattice dynamics of YCu2
K. Hensea, E. Gratz [Corresponding Author Contact Information] , [E-mail The Corresponding Author] , a, A. Lindbauma, H. Michora, H. Nowotnyb, F. Güthoffc, d, A. Hoserc, d and P. Knolle
a Institute for Solid State Physics, Vienna University of Technology, Wiedner Hauptstraße 8?10, A-1040, Wien, Austria
b Institute for Theoretical Physics, Vienna University of Technology, Vienna, Austria
c Institut für Kristallographie, RWTH Aachen, Jägerstraße 17?19, D-52066, Aachen, Germany
d IFF, Forschungszentrum Juelich, Juelich, Germany
e Institute for Experimental Physics, University Graz, Universitätsplatz 5, A-8010, Graz, Austria
Received 19 June 2002; revised 3 July 2002; accepted 3 July 2002. ; Available online 17 December 2002.
The lattice dynamics of the orthorhombic YCu2 compound has been studied by inelastic neutron scattering on a single crystal. An axially symmetric Born?von Karman model was applied to fit the neutron data. Ab initio calculations of the lattice dynamics at the [capital Gamma, Greek] -point provided important additional information for the Born?von Karman fit procedure. The calculated phonon density of states was compared with time-of-flight experiments on powdered YCu2 sample material. The experimental studies were completed by Raman experiments and measurements of specific heat, thermal expansion, and compressibility.
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