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Type: Artigo de periódico
Title: The Ferroelectric Mode In Orthorhombic Knbo3
Author: Hurrell J.P.
Bozinis D.G.
Abstract: Both Raman scattering and infrared reflectivity measurements have been performed to determine the complete optic mode spectrum of orthorhombic KNbO3 and characterize the ferroelectric modes. The low frequency, k ∼ 0 mode is quasitransverse and possesses a spacial anisotropy similar to the TA branch at finite k. Of the original cubic ferroelectric mode, the component along the remaining soft direction is found at 56 cm-1 and not overdamped (Γ/ω = 1), while the other two components have stiffened equally so that the mode is essentially isotropic in the orthogonal polarizations. © 1975.
Rights: fechado
Identifier DOI: 10.1016/0038-1098(75)90991-6
Date Issue: 1975
Appears in Collections:Unicamp - Artigos e Outros Documentos

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