TY - JOUR
T1 - Effect of pressure on zone-center phonons in hexagonal-close-packed metals
AU - Olijnyk, H.
AU - Jephcoat, A. P.
N1 - Funding Information:
Part of the work was supported by EPSRC under Grant No. GR/M32597.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2002/3
Y1 - 2002/3
N2 - We report on studies of several hexagonal-close-packed (hcp) metals by Raman scattering techniques in the diamond anvil cell for pressures up to 60 GPa. The pressure response of the observed transverse-optical (TO) zone-center phonon mode includes positive pressure shifts as well as anomalies, such as mode softening in connection with phase transitions. It is shown that the phonon frequencies and their pressure dependences are related to macroscopic elastic parameters. More general, these results show that the measurement of Raman-active phonons provides a direct probe of bonding in metals, and agreement with theoretical models gives additional confidence in ab initio techniques.
AB - We report on studies of several hexagonal-close-packed (hcp) metals by Raman scattering techniques in the diamond anvil cell for pressures up to 60 GPa. The pressure response of the observed transverse-optical (TO) zone-center phonon mode includes positive pressure shifts as well as anomalies, such as mode softening in connection with phase transitions. It is shown that the phonon frequencies and their pressure dependences are related to macroscopic elastic parameters. More general, these results show that the measurement of Raman-active phonons provides a direct probe of bonding in metals, and agreement with theoretical models gives additional confidence in ab initio techniques.
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U2 - 10.1007/s11661-002-0140-3
DO - 10.1007/s11661-002-0140-3
M3 - Article
AN - SCOPUS:85045292675
VL - 33
SP - 743
EP - 747
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
SN - 1073-5623
IS - 3
ER -