Static and dynamical structural study of ferroelectrics under applied electric field at various temperatures

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In-situ measuring techniques for lattice strain in ferroelectrics under applied high electric-field have been developed. An X-ray diffractometer with a simultaneous measuring system for dielectric properties is installed in Hiroshima University. The basis of structural study to investigate the static change in crystal structures under electric field at various temperatures is established in the laboratory, while the time-resolved measuring system is built up in SPring-8 by our group for dynamical study. We have succeeded in capturing instantaneous change in lattice strain in ferroelectrics for millionths of a second during the polarization reversal and the piezoelectric vibration using the system.