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JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
Volume 44, Issue 5A, Pages 3095-3098Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.44.3095
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The phase diagram with monoclinic phase near the morphotropic phase boundary (MPB) and the dielectric constant in a solid-solution system of perovskite-type ferroelectrics are discussed on the basis of the Landau-Devonshire-type free-energy function expressed in terms of polarization components. It is confirmed that the origin of the large dielectric response near the MPB can be attributed to the instability perpendicular to spontaneous polarization, called the transversal instability.
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