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Journal article

Far-Infrared Dielectric Response of Pbtio3 and Pbzr1-Xtixo3 Thin Ferroelectric-Films

Far-infrared transmittance and reflectance of PbTiO3, PbZr0.53Ti0.47O3 and PbZr0.75Ti0.25O3 thin films deposited by a sol-gel technique on sapphire substrates were measured between room temperature and 650 degrees C. The spectra were fitted with a classical oscillator model to calculate the dielectric response. Polar-mode parameters are more accurate than data on bulk ceramic materials and are in good agreement with them. An analysis of the soft-made behaviour and comparison with the low-frequency permittivity data clearly indicate the existence of additional relaxation that is always present in the several cm(-1) range, even at room temperature.

    Keywords: soft modes ; spectroscopy ; crystals ; raman

    Note:

    Fedorov, I Acad Sci Czech Republ,Inst Phys,Na Slovance 2,Cr-18040 Prague 8,Czech Republic Russian Acad Sci,Inst Gen Phys,Moscow 117942,Russia Ecole Polytech Fed Lausanne,Ceram Lab,Ch-1015 Lausanne,Switzerland

    Rc682

    Times Cited:35

    Cited References Count:18

    Reference

    Record created on 2006-08-21, modified on 2016-08-08

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