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“Crystallization E.M.F.” Investigation in the lithium niobate pulling process from the melt
Author(s) -
Aleksandrovskii A. L.,
Shumov D. P.
Publication year - 1990
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/crat.2170251102
Subject(s) - lithium niobate , crystallization , crystal (programming language) , materials science , lithium (medication) , crystal growth , rotation (mathematics) , orientation (vector space) , crystallography , analytical chemistry (journal) , chemistry , thermodynamics , physics , geometry , mathematics , optoelectronics , chromatography , medicine , computer science , programming language , endocrinology
Abstract E.M.F. in the lithium niobate crystal‐melt system as a function of pulling and rotation rates, crystal diameter and orientation was determined. Total E.M.F. is a sum of thermo‐E.M.F. and “crystallization E.M.F.” Δφ. The logarithmic approximation Δφ = Δφ 0 In (1 + /v 0 ), where v is a growth rate, Δφ 0 = 3.9 mV, v 0 = 1.9 mm/h is adequate. The Δφ magnitude is independent within the experimental error on the rotation rate and crystal orientation, whereas it is slightly increasing along with the diameter increase. Some existing models of electric phenomena accompanying crystal growth are discussed and a new model based on charge carrier injection into solid during growth is proposed.