Interweaving domain configurations in [001]-poled rhombohedral phase 0.68Pb(Mg[sub 1/3]Nb[sub 2/3])O[sub 3]–0.32PbTiO[sub 3] single crystals

Jiaping Han; Wenwu Cao
September 2003
Applied Physics Letters;9/8/2003, Vol. 83 Issue 10, p2040
Academic Journal
Domain structures in [001]-poled rhombohedral phase 0.68Pb(Mg[sub 1/3]Nb[sub 2/3])O[sub 3]–0.32PbTiO[sub 3] single crystals have been investigated using polarized light microcopy. It was found that the observed domain structures are quite different from those previously assumed four domain states with cross intersecting 71° charged domain walls. The pattern can be interpreted as interweaving of two types of twins in three dimensions. Each local twin pattern contains only two domains with a 109° charged domain wall in either [110] or [110]. The stacking of two 90° rotated twins produces a cross-hatching pattern for transmission optical microscope and an effective 4mm macroscopic symmetry. The pattern becomes simple twins when the imaging is focused at different depth. The domain size is 1–2 μm in all the samples observed and the twin layer thickness is about 50–100 μm. © 2003 American Institute of Physics.


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