The Experimental Evidence on the Existence of Fourfold Ferroelastic Domain Wall.

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  • Jeong Hee–Tae
    Center for Noncrystalline Materials, Yonsei University, Seoul 120–749, Korea
  • Jeong Se–Young
    Department of Physics, Pusan National University, Pusan 609–735, Korea
  • Kim W. T.
    Center for Noncrystalline Materials, Yonsei University, Seoul 120–749, Korea
  • Kim D. H.
    Center for Noncrystalline Materials, Yonsei University, Seoul 120–749, Korea

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  • Experimental Evidence on the Existence of Fourfold Ferroelastic Domain Wall

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Abstract

In order to verify the existence of fourfold ferroelastic domain wall, which is suggested by group-theoretical consideration, polarizing microscopy and X-ray Laue photography experiments were carried out for BiVO4 crystal which is expected to have fourfold walls only. The experimental results showed that the domains in ferroelastic BiVO4 have fourfold rotational symmetry relationship and the domain walls are characterized by these fourfold symmetry elements. This proves the domain walls in BiVO4 to be the fourfold wall and they were indexed as (101) and ( bar 1 01) in monoclinic reference system.

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