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Relaxor behavior in the solid solution between dielectric Ba(Mg1/3Nb2/3)O3 and ferroelectric PbTiO3

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2 Author(s)
Long, Xifa ; Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbua V5A 1S6, Canada ; Ye, Zuo-Guang

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Relaxor behavior has been found in the solid solution between complex perovskite Ba(Mg1/3Nb2/3)O3 (BMN) and ferroelectric PbTiO3 (PT), 0.4BMN-0.6PT, prepared by solid state reactions. A strong dispersion of the maximum dielectric permittivity ) appears around the temperature of Tm, which shifts towards higher temperatures with increasing frequency. The variation of Tm with frequency follows the Vogel-Fulcher relationship. The variation of 1/ε with temperature above Tm deviates from the Curie-Weiss law but satisfies a Lorentz-type function. The dielectric hysteresis loops are displayed at several temperatures which become slimmer at T≫Tm. The remnant polarization gradually decreases with increasing temperature and persists up to above Tm.

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Applied Physics Letters  (Volume:90 ,  Issue: 11 )