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Domain structures in orthorhombic KNbO3 and characterisation of single domain crystals

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Czechoslovak Journal of Physics B Aims and scope

Abstract

Domain configurations in large KNbO3 single crystals grown by a top seeded flux growth technique are studied by optical methods and etching techniques. The orientation of observed domain walls is consistent with the principles of mechanical compatibility and electrical neutrality. Experimental evidence for the existence of a new type of ferroelectric domain wall (S-wall) is presented. Miller indices of such walls are irrational and depend on spontaneous strain tensor coefficients. The preparation of large single domain crystals (up to 1/3 cm3) is described. Assessment of crystal perfection by x-ray topographic and interference methods reveals a very small mosaic spread (one minute of arc) and a good optical homogeneity.

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Authors and Affiliations

  1. Laboratory of Solid State Physics, Swiss Federal Institute of Technology, CH-8049, Zürich, Switzerland

    E. Wiesendanger

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  1. E. Wiesendanger
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Additional information

The author is very indebted to Dr. V.Janovec for helpful discussion of the S-wall problem, to W.Huber for crystal growth and to M.Zazzeri for crystal polishing.

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Wiesendanger, E. Domain structures in orthorhombic KNbO3 and characterisation of single domain crystals. Czech J Phys 23, 91–99 (1973). https://doi.org/10.1007/BF01596882

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  • DOI: https://doi.org/10.1007/BF01596882

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