Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 241, Issue 14, Pages 3149-3154Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.200405230
Keywords
-
Categories
Ask authors/readers for more resources
The effect of high hydrostatic pressure on Y3Al5O12 (YAG) single crystals has been studied up to 15 GPa by Raman spectroscopy at room temperature. The pressure dependence of 23 Raman-active modes, out of 25 predicted by group theory, has been followed. The determined mode Gruneisen parameters (gamma(i)) extend over a relatively narrow range (0.6-2.4) indicating binding forces of the same nature and order of magnitude. However, the modes in the high (650-900 cm(-1)) and middle (500-600 cm(-1)) regions of the Raman spectrum exhibit gamma(i) parameter values ranging between 0.9-1.4 and 0.7-0.8, respectively; reflecting that different type of AlO4 molecular vibrations and consequently different kind of restoring forces being involved in these modes, in accordance with theoretical predictions. The strength of interactions in YAG along with the high compactness of the garnet structure explains, somehow, their high stability upon pressure. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available