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Ferroelectrics
Paper

Raman measurements of the ferroelectric ba0.4Sr0.6Nb2O6

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Abstract

Using Raman spectroscopy, we have measured the A1 (TO) and E(TO) phonons in the tungsten bronze structured ferroelectric Ba0.4Sr0.6Nb2O6 (BSN). We observe phonon anomalies associated with Tc and also with a temperature ≈425°C. The latter is in the region where index of refraction measurements indicate the onset of a local polarization. By quenching the crystal from high temperatures, Tccan be shifted. We find that the phonon anomalies shift corresponding to the new Tc values. © 1990, Taylor & Francis Group, LLC. All rights reserved.

Date

01 Aug 1990

Publication

Ferroelectrics

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