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Space‐Charge Polarisation and X‐Ray Diffraction Extinction Reduction in Synthetic and Natural Quartz Crystals
Author(s) -
Sebastian M. T.,
Klapper H.
Publication year - 1994
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221860202
Subject(s) - electric field , diffraction , quartz , intensity (physics) , optics , x ray crystallography , extinction (optical mineralogy) , space charge , x ray , crystal (programming language) , materials science , tilt (camera) , physics , geometry , electron , mathematics , quantum mechanics , computer science , composite material , programming language
An X‐ray diffraction study of α‐quartz crystals with in situ electric field along the different crystallographic axes shows a strong enhancement in the diffracted intensity. The effect is prominent in natural crystals when the electric field is along the c‐axis. This is evidenced by the increase in the intensity of X‐ray rocking curves recorded from several crystals. The X‐ray topographs recorded with in situ electric field show extinction contrast consisting of striations parallel to the c‐axis. This contrast disappears during irradiation in the absence of an electric field. The increase in the diffracted intensity and the contrast on the topographs are explained by a model on negative space‐charge collection.