High pressure phase transition in gallium nitride
- 15 December 1991
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 7 (1-6) , 96-98
- https://doi.org/10.1080/08957959108245516
Abstract
Gullium nitrider GaN has been studied b, y Ramun scattering und x-ro ) absorpt ion spectroscopy under presrure up to 55 GPa. A phase t ransi t ion isobserved for the first lime at 47 GPa. lhr equal ion OJ state is determined with Bo +245 CPa using Bo51.The Criirreisen mode parameter of the four observedphonon modes are deduced. Le nifrure de gallium, GaN a eté étudié par diffusion Ramun etspeclroscopie d'absorpt ion X jusqu'à 55 GPa. Une transition de phase a eté observée pour la premiére jois à 41 CPa. En imposunt B0 =4 on peut reproduire I'équuiion d'e'fut avec B0=245 GPa. On en deduif les paramétres de Crüneisen des quatre modes observés.Keywords
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