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Experimental Evidence for a Step Growth Mechanism of Garnet LPE Films
Author(s) -
Hergt R.,
Bürger W.
Publication year - 1981
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.2170160706
Subject(s) - spiral (railway) , supercooling , materials science , condensation , rotation (mathematics) , optics , optical microscope , interference (communication) , nanotechnology , molecular physics , chemistry , composite material , physics , geometry , thermodynamics , scanning electron microscope , mathematical analysis , mathematics , channel (broadcasting) , electrical engineering , engineering
Experimental observations suggesting a lateral growth mode at {110} and {211} garnet LPE films are reported. Growth steps are revealed using a gold decoration technique and a new decoration method based on the condensation of PbO nuclei is developed which allows to image the step structure of the whole film surface using light optical interference contrast. The step velocity reduced per K undercooling of spiral steps having step distances larger than 100 nm amounts to (0.70 ± 0.10) μm/min ± K independently of step density. Spiral rotation rates and critical nuclei radii are in the order of 1 s −1 and 10 nm respectively.