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JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
Volume 44, Issue 10, Pages 7512-7517Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.44.7512
Keywords
polarization reversal; ferroelectrics; 90 degrees wall; Landau-Ginzburg free energy
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Polarization reversals in ferroelectrics in the presence of 90 degrees domain walls are studied using a simplified model. The rotation of a single polarization under the field applied perpendicularly to the original orientation correlates to the anisotropy of local potential energy. The polarization reversals in a ferroelectric system consisting of the a- and the c-domains are studied on the basis of the Landau-Ginzburg free energy. A complex mechanism of polarization reversal was found to depend strongly on the spatial anisotropy of the Landau-Ginzburg energy.
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