Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 743-747 |
| Number of pages | 5 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 33 |
| Issue number | 3 |
| Publication status | Published - Mar 2002 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Science(all)
- Metals and Alloys
- Condensed Matter Physics
- Mechanics of Materials
Cite this
Effect of pressure on zone-center phonons in hexagonal-close-packed metals. / Olijnyk, H.; Jephcoat, A. P.
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 33, No. 3, 03.2002, p. 743-747.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of pressure on zone-center phonons in hexagonal-close-packed metals
AU - Olijnyk, H.
AU - Jephcoat, A. P.
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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UR - http://www.scopus.com/inward/citedby.url?scp=0036494650&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0036494650
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 -