Germanium is found to be a growth inhibitor in the liquid phase epitaxy of yttrium aluminum garnet. Germanium oxide additions to PbO/B2O3 fluxed melts for the liquid phase epitaxy of Y3Al5O12 and Ce:Y3Al5O12 on Y3Al5O12 substrates reduce the epitaxial growth rate in an effect similar to that with calcium oxide additions to melts for the growth of Y3Fe5O12. In contrast, cerium oxide additions to Y3Al5O12 melts have no measurable effect on growth rate. Germanium oxide additions reduce the growth rate sensitivity with supercooling, at saturation temperatures near 900 °C, as an essentially linear decreasing function of the germanium oxide concentration, GeO2/(GeO2+2Al2O3), where GeO2 and Al2O3 are the molar concentrations of germanium and aluminum oxide in the melt.
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5 August 1991
Research Article|
August 05 1991
Liquid phase epitaxy of yttrium aluminum garnet: Reduction of growth rate by germanium oxide
D. M. Gualtieri
D. M. Gualtieri
Applied Physics Laboratory, Allied‐Signal Inc., P. O. Box 1021, Morristown, New Jersey 07962
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D. M. Gualtieri
Applied Physics Laboratory, Allied‐Signal Inc., P. O. Box 1021, Morristown, New Jersey 07962
Appl. Phys. Lett. 59, 650–652 (1991)
Article history
Received:
March 07 1991
Accepted:
May 06 1991
Citation
D. M. Gualtieri; Liquid phase epitaxy of yttrium aluminum garnet: Reduction of growth rate by germanium oxide. Appl. Phys. Lett. 5 August 1991; 59 (6): 650–652. https://doi.org/10.1063/1.105381
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