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A single shot soft x-ray laser speckle observation technique has been developed and applied to the ferroelectric phase transition of BaTiO3. Domain evolutions near the phase transition are investigated. A critical region continues to exist down to 6K below the Currier temperature (TC). A snap shot x-ray speckle in the parraelectric critical region revealed an existence of the polarization...
Coherent soft x-ray laser speckle has been examined to study the microdomain structures of relaxor ferroelectric 0.91PZN—09PT. Microdomains with nanometer size of about 400 nm were identified precisely. Temperature variation and electric field variation of the micro domain were characterized by a kind of foot print method with high sensitivity of a percent order.