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Article Dans Une Revue AIP Advances Année : 2017

Polar nature of stress-induced twin walls in ferroelastic CaTiO3

Résumé

A compressive uniaxial mechanical stress is applied on ferroelastic CaTiO3 (CTO), and a change in the domain structure is observed under a polarization microscope and a second harmonic generation (SHG) microscope. New twin walls (TWs) appear perpendicular to the original TWs under stress. The SHG microscope observations and analyses confirm that this type of stress-induced TWs is polar, similar to the original TWs, and is crystallographically prominent with monoclinic symmetry m. A quantitative estimation of this stress-induced effect reveals that CTO is hard ferroelastic in the sense that the TW movement requires a large stress. A possible application of this phenomenon is discussed.

Dates et versions

hal-01781595 , version 1 (30-04-2018)

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Citer

H. Yokota, S. Niki, R. Haumont, Pierre-Yves Hicher, Y. Uesu. Polar nature of stress-induced twin walls in ferroelastic CaTiO3. AIP Advances, 2017, 7 (8), ⟨10.1063/1.4990608⟩. ⟨hal-01781595⟩
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