Characterization and comparison of nanoscale domain boundary in congruent and stoichiometric LiTaO3 with scanning nonlinear dielectric microscopy

Dae-Yong Jeong; Yasuo Cho
July 2009
Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p022908
Academic Journal
The domain boundary of congruent LiTaO3 (CLT) and stoichiometric LiTaO3 (SLT) were characterized on the nanoscale using scanning nonlinear dielectric microscopy. SLT exhibited a smooth domain boundary but CLT showed an irregular domain boundary. The nonlinear dielectric constant [variant_greek_epsilon]333 in the domain boundary of SLT changed abruptly from the domain but there was a gradual change in [variant_greek_epsilon]333 in the boundary of CLT. The linear dielectric constant in the domain boundary of SLT was slightly higher than that in the domain itself. In addition, the topography showed that only SLT had <1 nm dimensional deformation in the domain boundary.


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