Ferroelectric domains in epitaxial PbZr0.65Ti0.35O3/La0.5Sr0.5CoO3 heterostructures

Plekh, M.; Tyunina, M.
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p062902
Academic Journal
In epitaxial heterostructures of PbZr0.65Ti0.35O3/La0.5Sr0.5CoO3/MgO(001) with large lattice mismatch, ferroelectric domains were studied using piezoresponse force microscopy and microstructure analysis. In the c-oriented tetragonal PbZr0.65Ti0.35O3 films, random arrays of 0.1–1 μm sized ferroelectric domains with facet-type 180° boundaries were found. The lateral inhomogeneity of the switching fields and of the field-induced strains was detected. The results are discussed in terms of island growth and dislocation generation in epitaxial heterostructures having large lattice mismatch.


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