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Dynamic criticality in driven disordered systems: role of depinning and driving rate in Barkhausen noise

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  • Tadić, Bosiljka

Abstract

We study Barkhausen noise in a diluted two-dimensional Ising model with the extended domain wall and weak random fields occurring due to coarse graining. We report two types of scaling behavior corresponding to (a) low disorder regime where a single domain wall slips through a series of positions when the external field is increased, and (b) large disorder regime, which is characterized with nucleation of many domains. The effects of finite concentration of nonmagnetic ions and variable driving rate on the scaling exponents is discussed in both regimes. The universal scaling behavior at low disorder is shown to belong to a class of critical dynamic systems, which are described by a fixed point of the stochastic transport equation with self-consistent disorder correlations.

Suggested Citation

  • Tadić, Bosiljka, 1999. "Dynamic criticality in driven disordered systems: role of depinning and driving rate in Barkhausen noise," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 270(1), pages 125-134.
    • Handle: RePEc:eee:phsmap:v:270:y:1999:i:1:p:125-134
    DOI: 10.1016/S0378-4371(99)00143-0
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    Cited by:

    1. Tadić, Bosiljka, 2018. "Dynamical implications of sample shape for avalanches in 2-dimensional random-field Ising model with saw-tooth domain wall," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 493(C), pages 330-341.
    2. Spasojević, Djordje & Janićević, Sanja, 2023. "Disordered ferromagnetic systems with stochastic driving," Chaos, Solitons & Fractals, Elsevier, vol. 169(C).
    3. Spasojević, Djordje & Janićević, Sanja, 2022. "Two-dimensional ferromagnetic systems with finite driving," Chaos, Solitons & Fractals, Elsevier, vol. 158(C).

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