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Figure 2
Scheme of the polarization vectors (projected on the plane yz) of the distortions GM5− (a) and GM4− (b) present in the Amm2 structure of BaTiO3. The figure shows in each case the distorted structure for an exaggerated amplitude of the mode. Also, schematic arrows indicating the atomic displacements are depicted within a single unit cell.

ISSN: 2053-2733
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