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Large electric-field-induced strain in Bi0.5Na0.5TiO3Bi0.5K0.5TiO3 solid solution single crystals

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5 Author(s)
Izumi, Makoto ; Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan ; Yamamoto, Katsuya ; Suzuki, Muneyasu ; Noguchi, Yuji
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Single crystals of ferroelectric (1-x)Bi0.5Na0.5TiO3–xBi0.5K0.5TiO3 (BKT) solid solution with rhombohedral structure were grown by flux method in the composition range of 0≪x≪0.14. The polarization hysteresis, electric-field-induced strain, and temperature dependence of dielectric permittivity were investigated along the [100]cubic direction. Although small substitution of BKT suppressed the remanent polarization from 38 μC/cm2 at x=0 to about 15 μC/cm2 at x≫0.02, piezoelectric strain constant (d33) was enhanced with increasing x up to 297 pm/V at x=0.14.

Published in:

Applied Physics Letters  (Volume:93 ,  Issue: 24 )