TY - GEN
T1 - Domain Reversal and Wall Structure of 180° Ferroelectric Domains in LiTaO3 Crystals
AU - Gopalan, Venkatranian
AU - Kitarnura, K.
AU - Furukawa, Y.
PY - 2000/9/12
Y1 - 2000/9/12
N2 - We report a dramatic influence of lithium nonstoichiometry in LiTaO3 crystals on the 180° coercive fields, internal fields, domain wall strain, optical birefringence, and domain shape. Congruent composition of LITaO3 ( [Li]/([LI]+[Ta])~0.485) show large coercive fields of ~21kV/mm for domain motion and built-in internal fields of ~4.5kV/mn, domain wall strains of |ϵn| ~(1-10)x10-6, optical birefringence in the z-plane, and triangular domains with domain walls parallel to the crystallographic x-axes. On the other hand, near-stolchiometrlc crystals of LiTaO3 ([Li]/([Li]+[Ta])~0.499) studied here show low coercive fields of ~1.7kV/mm, internal fields of <0.1kV/mm, negligible domain wall sixain or optical birefringence, and six-sided domains with domain walls parallel to crystallographic y-axes.
AB - We report a dramatic influence of lithium nonstoichiometry in LiTaO3 crystals on the 180° coercive fields, internal fields, domain wall strain, optical birefringence, and domain shape. Congruent composition of LITaO3 ( [Li]/([LI]+[Ta])~0.485) show large coercive fields of ~21kV/mm for domain motion and built-in internal fields of ~4.5kV/mn, domain wall strains of |ϵn| ~(1-10)x10-6, optical birefringence in the z-plane, and triangular domains with domain walls parallel to the crystallographic x-axes. On the other hand, near-stolchiometrlc crystals of LiTaO3 ([Li]/([Li]+[Ta])~0.499) studied here show low coercive fields of ~1.7kV/mm, internal fields of <0.1kV/mm, negligible domain wall sixain or optical birefringence, and six-sided domains with domain walls parallel to crystallographic y-axes.
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U2 - 10.1063/1.1324455
DO - 10.1063/1.1324455
M3 - Conference contribution
AN - SCOPUS:0242436110
T3 - AIP Conference Proceedings
SP - 183
EP - 190
BT - Fundamental Physics of Ferroelectrics 2000
A2 - Cohen, Ronald E.
A2 - Mewaldt, Richard A.
PB - American Institute of Physics Inc.
T2 - Aspen Center for Physics Winter Workshop on Fundamental Physics of Ferroelectrics 2000
Y2 - 13 February 2000 through 20 February 2000
ER -