Polarization Reversal and Ferroelectric Domain Structure Observed in Electroded Cesium Dihydrogen Phosphate Crystals Using an X-Ray Anomalous Dispersion Effect

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概要

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• We have carried out an X-ray intensity uaaeastrrement and X-ray topography on electrodedb plates of ferroelectric cesium dihydrogen phosphate, CSH2PO4 (CDP), using a synchrotronradiation with a wax'elength of 2.482 A above the Cs L3-absorption edge. We have fotrnd thatintegrated intensities #(150) and #(150) show an anomalously large breakdown of Friedel's law,#(150)/#(150) : 10.4 at l25K, and display a ferroelectric hysteresis loop. The hysteresis loopdetertaaines that spontaneous polarization is antiparallel to the b axes set in both ferroelectriccrystal structtrres related by inx'ersions. Tlae (150) diffraction topography shows that a singledomain ttrrns into a larnellar domain strtrcttrre xvithotrt fractal aspects after short-circuiting theb plate. The atomic displacement associated with polarization reversal is shown in a crystalstructure model of 180' domains observed in the X-ray topograph.

• 社団法人日本物理学会の論文
• 1997-02-15

著者

• Kawata H

  Institute Of Materials Structure Science High Energy Accelerator Research Organization (kek)

• Kawata Hiroshi

  Photon Factory Institute Of Materials Structure Science

• Ozaki Toru

  Depatment Of Materials Science Faculty Of Science Hiroshima University

• Mizuno Kaoru

  Depatment Of Material Science Interdisciplinary Faculty Of Science And Engineering Shimane Universit

• AMAU Toshirou

  Depatment of Materials Science,Faculty of Science,Hiroshima University

• MORI Koichi

  Depatment of Radiological Sciences,Ibaraki Prefectural University of Health Sciences

• Amau Toshirou

  Depatment Of Materials Science Faculty Of Science Hiroshima University

• Kawata Hiroshi

  Photon Faculty National Laboratory For High Energy Physics

• Mori Koichi

  Depatment Of Radiological Sciences Ibaraki Prefectural University Of Health Sciences

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• Polarization Reversal and Ferroelectric Domain Structure Observed in Electroded Cesium Dihydrogen Phosphate Crystals Using an X-Ray Anomalous Dispersion Effect

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