Fabrication of 90-degree domain structures in KNbO3 single crystals

New domain (90 domain) structure in the KNbO 3 single crystal could be fabricated by applying electric field at room temperature. The coercive electric field of 90 domain is very low (140 V/mm) compared with that of 180 domain (250 V/mm). A very sharp boundary was observed across the whole sample th...

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Bibliographic Details
Published in:Ferroelectrics 2003, Vol.282, p.29
Main Author: Hirohashi, Junji
Format: Article
Language:English
Subjects:
Engineering physics
Optical physics
Optisk fysik
TECHNOLOGY
TEKNIKVETENSKAP
Teknisk fysik
Online Access:Get full text
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Summary:New domain (90 domain) structure in the KNbO 3 single crystal could be fabricated by applying electric field at room temperature. The coercive electric field of 90 domain is very low (140 V/mm) compared with that of 180 domain (250 V/mm). A very sharp boundary was observed across the whole sample thickness (2 mm). Fabricated 90 domain structures were also confirmed by the (101) surface profile measurement using the optical interferrometer and two peaks of the 404 X-ray diffraction analysis. We also demonstrated the fabrication of periodically 90 domain structures with 200 μ m period without generating unwanted domain structures. As 90 domain structure feels the difference of the refractive index, new applications other than 180 domain will be possible.
ISSN:0015-0193
1563-5112