Polar nature of stress-induced twin walls in ferroelastic CaTiO3
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Acoustic Wave Resonator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Chiba University 1 , 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan
Institut de Chimie Moléculaire et Matériaux d’Orsay, Université Paris Sud 2 , 91405 Orsay Cedex, France
Laboratoire SPMS, Ecole Centrale Paris 3 , Grande voie des vignes, 92295 Chatenay-Malabry, France
Department of Physics, Waseda University 4 , 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
Funding
Ministry of Education, Culture, Sports, Science and Technology
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