Raman spectra of Ba2NaNb5O15

descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 1971 English Publisher:Informa UK LimitedJournal:Ferroelectrics, volume 2, pages 217-223 (issn: 0015-0193, eissn: 1563-5112,

Authors: I. Lefkowitz; L. C. Bobb; L. Muldawer;

doi: 10.1080/00150197108241509

Raman spectra of Ba2NaNb5O15

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Abstract

The Raman spectra of Ba2NaNb5O15 single crystals were recorded for various scattering configurations from 77°K to 843°K. Splittings of the vibrational modes due to electrostatic and anisotropic forces were found to be small. The line-widths of the 650 cm-1 and the 280 cm-1 modes were found to increase with increasing temperature. The 'soft' A1(z) mode at 723°K was fitted by means of a graphical interpolation to an overdamped lineshape with an undamped mode frequency of 40 cm-1 and a damping constant of 2.

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