Atomic Force Microscopy Observation of Ferroelastic Domain Boundary in GdP5O14.

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  • Takei Iwao
    Department of Physics, Hokuriku University, Ho–3, Kanagawa–machi, Kanazawa 920–11
  • Kobayashi Tadashi
    Department of Physics, Hokuriku University, Ho–3, Kanagawa–machi, Kanazawa 920–11
  • Nakamura Shizuo
    Industrial Research Institute of Ishikawa, Ro–1 Tomizu, Kanazawa 920–02
  • Yamana Kazuo
    Industrial Research Institute of Ishikawa, Ro–1 Tomizu, Kanazawa 920–02

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  • Atomic Force Microscopy Observation of
  • Atomic Force Microscopy Observation of Ferroelastic Domain Boundary in GdP<sub>5</sub>O<sub>14</sub>

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The surface structure of GdP5O14 (gadolinium pentaphosphate) with a ferroelastic domain boundary is investigated by AFM (atomic force microscopy) at room temperature in air. The AFM data are obtained for a 1500-nm-square area (400× 400 data points) on the (100) surface of the sample. The domain boundary is observed as a zigzag pattern about 300, nm in width. The contour map of the surface shows a unique surface structure in which hollows are aligned along the domain boundary; the hollows have a width of about 600, nm and a depth of 2, nm. If the surface image indicates a strain originating from the domain boundary structure, the thickness of the ferroelastic domain wall of GdP5O14 is estimated to be about 0.6, μ m at room temperature.

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