Determination of the mode Grüneisen parameter of AlN using different fits on experimental high pressure data

NWA van Uden, H Hubel, JM Hayes, AD Prins, M Kuball, DJ Dunstan, JR Downes, Y Shi, JH Edgar

Research output: Contribution to journalArticle (Academic Journal)peer-review

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 contributionDetermination of the mode Grüneisen parameter of AlN using different fits on experimental high pressure data
Original languageEnglish
Pages (from-to)37-41
Number of pages5
JournalHigh Pressure Research
Volume22
Issue number1
DOIs
Publication statusPublished - 2002

Bibliographical note

Special Issue: 39th European High Pressure Research Group Meeting notes

Structured keywords

  • CDTR

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