Electrical studies of Barkhausen switching noise in ferroelectric PZT : critical exponents and temperature dependence
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Crackling noise of ferroelectric lead zirconate titanate samples during ferroelectric switching is demonstrated to be compatible with avalanche statistics. The peaks of the slew rate (time derivative of current dI/dt squared), defined as "jerks," were statistically analyzed and shown to obey power laws. The critical exponent obtained is 1.64 ± 0.15, in agreement with predictions from avalanche theory. The exponent is independent of temperature within experimental error margins.
Tan , C D , Flannigan , C , Gardner , J , Morrison , F D , Salje , E K H & Scott , J F 2019 , ' Electrical studies of Barkhausen switching noise in ferroelectric PZT : critical exponents and temperature dependence ' , Physical Review Materials , vol. 3 , no. 3 , 034402 . https://doi.org/10.1103/PhysRevMaterials.3.034402
Physical Review Materials
Copyright © 2019 American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevMaterials.3.034402
DescriptionThis work at St Andrews was supported by EPSRC grant EP/P024637/1. EKHS thanks EPSRC for support.
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