Summary: High Pressure Research, 2002, Vol. 22, pp. 501506
PHONON SPECTROSCOPY OF ORIENTED HCP IRON
, R. LU¨ BBERSa
, K. RUPPRECHTa
, G. WORTMANNa,
and A. I. CHUMAKOVc
Fachbereich Physik, University of Paderborn, D-33095 Paderborn, Germany; b
London, London WC1E 6BT, UK; c
ESRF, Experimental Division, BP 220,
F-38043 Grenoble, France
(Received 19 July 2001; In final form 28 September 2001)
High-pressure phonon spectroscopy was performed on iron in the bcc and hcp phase up to 40 GPa using the nuclear
inelastic scattering (NIS) of synchrotron radiation (SR). In hcp iron we observe differences in the density of phonon
states for spectra measured with different orientations of the diamond anvil cell (DAC) with respect to the SR beam.
These differences are attributed to a preferred orientation of the hexagonal c-axis along the load axis of the DAC.