Electrical studies of Barkhausen switching noise in ferroelectric lead zirconate titanate (PZT) and BaTiO 3 : Critical exponents and temperature-dependence
2019
Previous studies of Barkhausen noise in PZT have been limited to the energy spectrum (slew rate response voltages versus time), showing agreement with avalanche models; in barium titanate other exponents have been measured acoustically, but only at ambient temperatures. In the present study we report the Omori exponent (0.95 [Formula: see text] 0.03) for aftershocks in PZT and extend the barium titanate studies to a wider range of temperature.
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