Abstract
To investigate the pressure dependence of the AlN phonon frequencies
Raman spectra of single-crystalline bulk AlN under hydrostatic pressure
up to 10 GPa were recorded. The Raman peak positions of the A 1 (TO), E 1
(TO), E 2 (high), A 1 (LO) and quasi-longitudinal optical (QLO) phonons
were plotted as a function of pressure. The experimental data was
fitted using the traditional parabolic fit (M. Kuball et al . (2001)
Appl. Phys. Lett., 78, 724 [1]) and fits to physical models, density,
volume, etc. The mode Grüneisen parameters of the different phonons were
determined for each fit and significant differences are found between
the various fits. Results are compared with recent theoretical
calculations (J.-M. Wagner et al . (2000) Phys. Rev. B, 62, 4526 [2]).
Translated title of the contribution | Determination of the mode Grüneisen parameter of AlN using different fits on experimental high pressure data |
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Original language | English |
Pages (from-to) | 37-41 |
Number of pages | 5 |
Journal | High Pressure Research |
Volume | 22 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2002 |
Bibliographical note
Special Issue: 39th European High Pressure Research Group Meeting notesResearch Groups and Themes
- CDTR