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Thin polycrystalline films made from a base composition of Pb0.92Bi0.07La0.01 (Fe0.405Nb0.325Zr0.27) O3 exhibited a spontaneous polarization of 10 to 20 μC per square centimeter, hysteresis-loop squareness ≥0.75, coercivity≤15 kV/cm, Curie temperature≃150°C, resistivity≃1011 Ω·cm, and initial dielectric constant of about 1000. In a pulsed-life test, one such film was repetitively switched in 300 nsec by 20-V applied pulses for more than 2×1011 polarization reversals before the test was terminated for convenience.
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D.W. Chapman (1969) studied this question.
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