Domain reversal and wall structure of 180° ferroelectric domains in crystals
- Conference date: 13-20 Feb 2000
- Location: Aspen, Colorado (USA)
We report a dramatic influence of lithium nonstoichiometry in crystals on the 180° coercive fields, internal fields, domain wall strain, optical birefringence, and domain shape. Congruent composition of show large coercive fields of ∼21 kV/mm for domain motion and built-in internal fields of ∼4.5 kV/mm, domain wall strains of optical birefringence in the z-plane, and triangular domains with domain walls parallel to the crystallographic x-axes. On the other hand, near-stoichiometric crystals of studied here show low coercive fields of ∼1.7 kV/mm, internal fields of <0.1 kV/mm, negligible domain wall strain or optical birefringence, and six-sided domains with domain walls parallel to crystallographic y-axes.
- Domain walls
- Coercive force
- Crystal structure
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