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Enhancement of the Automatic Diameter Control System for the Czochralski Growth of Nd:GdVO 4 Crystals
Author(s) -
Kochurikhin V. V.,
Terada Y.,
Epelbaum B. M.,
Shimamura K.,
Fukada T.
Publication year - 1998
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/(sici)1521-4079(1998)33:5<793::aid-crat793>3.0.co;2-9
Subject(s) - vanadate , crystal growth , czochralski method , materials science , crystal (programming language) , doping , generator (circuit theory) , rare earth , crystallography , analytical chemistry (journal) , chemistry , power (physics) , optoelectronics , computer science , physics , metallurgy , thermodynamics , chromatography , programming language
The automatic diameter control system was enhanced for the growth of Nd‐doped GdVO 4 single crystals by the Czochralski method. It was estimated that excessive amount of feedback in the control system is the effective way to improve the shape of rare‐earth vanadate single crystals. The spectral analysis for crystal weight and generator power signals was carried out in real time during growth process for determination of oscillations in the control system.