Electrical and optical properties of relaxor ferroelectrics

D. A. Mchenry, J. R. Giniewicz, T. R. Shrout, S. J. Jang, A. S. Bhalla

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16 Scopus citations


The dielectric and optic/electro-optic properties of hot-pressed ceramics of composition (l-x)(Pb1-y - Lay)(Mg1/3Nb2/3)O3 - xPbTiO3 (y = 0.01) have been investigated. The materials exhibit high peak dielectric constants (>20000) with typical relaxor ferroelectric behavior. The ceramics are adequately transparent for optical and electro-optical evaluation with transmission better than 50% at 600 nm. High refractive indices are observed (>2.5 at 632.8 nm) and the dispersion of the refractive index is well described by a single-term Sellmeier equation. The temperature dependence of the refractive index exhibits a linear region above 390°C and a polarization induced decrease of the index via the electrooptic effect below this temperature. The transverse quadratic electro-optic coefficients, (R11-R12) and (g11-g12), were evaluated both as a function of temperature and frequency. Electro-optic switching experiments indicate rapid response of less than 1 μsec, suitable for transverse shutter mode operation.

Original languageEnglish (US)
Pages (from-to)161-171
Number of pages11
Issue number1
StatePublished - Feb 1 1990

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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