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Polarization reversal and domain anisotropy in flux-grown KTiOPO4 and isomorphic crystals

Published online by Cambridge University Press:  31 January 2011

P. Urenski ,
G. Rosenman  and
M. Molotskii
P. Urenski
Affiliation:
Department of Electrical Engineering—Physical Electronics, Tel Aviv University, Ramat-Aviv, 69978, Israel
G. Rosenman*
Affiliation:
Department of Electrical Engineering—Physical Electronics, Tel Aviv University, Ramat-Aviv, 69978, Israel
M. Molotskii
Affiliation:
School of Physics and Astronomy, Beverly and Raymond Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat-Aviv, 69978, Israel
*
a)Address all correspondence to this author. e-mial: girl@eng.tau.ac.il
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Abstract

Spontaneous polarization reversal and domain structures of flux-grown ferroelectric KTiOPO4 and isomorphic crystals were studied. Two temperature regions with dominant either ionic or electronic conductivity were found. It was shown that in the high-temperature region mobile cations contributed sufficiently to internal screening process. The ionic leakage current was suppressed at a specific temperature point for each studied crystal. High crystallographic asymmetry of domain wall velocity was observed. This shows that the electrode pattern should be properly oriented relative to the crystal axes of KTiOPO4 and its isomorphs for fabrication of periodically poled domain configurations used in nonlinear optical conversions.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 5 , May 2001 , pp. 1493 - 1499
Copyright
Copyright © Materials Research Society 2001

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