X-Ray Diffraction Topography on a BaTiO_3 Crystal (Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

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We have observed 90° domain walls in a bulk BaTiO_3 crystal by synchrotron radiation topography, coupled with a CCD detector. The BaTiO_3 multi-domain crystal was revealed to be strained at the 90° domain boundary. The polar direction of the BaTiO_3 crystal was tilted by this strain, and this strain also causes the irregular angle of the surface bending mode. The synchrotron X-ray topography can be performed on a sample with electrodes. The topographic image of the ferroelectric domain with an electric field clarified that the well-known stripe domain configuration can not be observed without a weak electric field due to the lattice strain at the domain boundary.
社団法人日本物理学会の論文
2004-04-15