Charged Domain Walls and Crystallographic Microstructures in Hybrid Improper Ferroelectric Ca<sub>3−</sub><i><sub>x</sub></i>Sr<i><sub>x</sub></i>Ti<sub>2</sub>O<sub>7</sub>

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  • Nakajima Hiroshi
    Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University
  • Shigematsu Koji
    The Ultramicroscopy Research Center, Kyushu University
  • Horibe Yoichi
    Department of Materials Science and Engineering, Kyushu Institute of Technology
  • Mori Shigeo
    Department of Materials Science, Osaka Prefecture University
  • Murakami Yasukazu
    Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University The Ultramicroscopy Research Center, Kyushu University

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  • Charged Domain Walls and Crystallographic Microstructures in Hybrid Improper Ferroelectric Ca[3-x]Sr[x]Ti₂O₇

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<p>The charged domain walls in ferroelectric materials exhibit intriguing physical properties. We examine herein the charged-domain-wall structures in Ca3−xSrxTi2O7 using transmission electron microscopy. When viewed along the [001] axis, the wavy charged domain walls are observed over a wide range (>5 µm). In contrast, short charged-domain-wall fragments (from 10 to 200 nm long) occur because they are intercepted and truncated by the conventional 180° domain walls. These results reveal the unusual charged domain structures in Ca3−xSrxTi2O7 and will be useful for understanding their formation process.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 60 (10), 2103-2108, 2019-10-01

    The Japan Institute of Metals and Materials

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