X-ray Intensity Fluctuation Spectroscopy Using Nanofocused Hard X-rays: Its Application to Study of Relaxor Ferroelectrics

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概要

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• The use of a combination of coherent X-rays from a third-generation synchrotron light source and ultraprecise Kirkpatrick-Baez mirrors enables us to apply nanofocused hard X-rays in solid-state physics. We developed an apparatus for X-ray intensity fluctuation spectroscopy using the nanofocused hard X-rays and applied it to the study of relaxor ferroelectrics. We have successfully detected a large and slow intensity fluctuation of scattered X-rays above cubic-to-tetragonal phase transition temperature with a characteristic time scale on the order of 10 s. We speculated that the intensity fluctuation originates from domain number fluctuation, which is directly related to the dielectric response, particularly the frequency dispersion.

• 2010-02-25

著者

• SHIMOMURA Susumu

  Faculty of Science and Technology, Keio University

• NAMIKAWA Kazumichi

  Tokyo Gakugei University

• Kenji Ohwada

  Quantum Beam Science Directorate, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan

• Hironori Nakao

  Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan

• Kazuto Yamauchi

  Department of Precision Science and Technology, Graduate School of Engineering, University of Osaka, Osaka 565-0871, Japan

• Hidekazu Mimura

  Department of Precision Science and Technology, Graduate School of Engineering, University of Osaka, Osaka 565-0871, Japan

• Ohwada Kenji

  Quantum Beam Science Directorate, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan

• Mitsuyoshi Matsushita

  Functional Materials Development Center, Research Laboratories, JFE Mineral Co., Ltd., Chiba 260-0826, Japan

• Susumu Shimomura

  Faculty of Science and Technology, Keio University, Yokohama 223-8522, Japan

• Kazumichi Namikawa

  Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan

• Jun'ichiro Mizuki

  Quantum Beam Science Directorate, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan

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