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Waiting-time statistics in magnetic systems.

Ivandson Praeiro de Sousa1,2,3, Gustavo Zampier Dos Santos Lima4, Marcio Assolin Correa1

  • 1Departamento de Física, Universidade Federal do Rio Grande do Norte, 59078-970, Natal, RN, Brazil.

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|June 18, 2020
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Summary
This summary is machine-generated.

Researchers studied waiting-time statistics in magnetic systems by analyzing Barkhausen noise. They discovered the waiting-time distribution reveals universal properties of magnetic avalanches and domain wall dynamics.

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Area of Science:

  • Physics, Condensed Matter
  • Materials Science

Background:

  • Complex systems, including ferromagnetic materials, exhibit avalanche-like events with characteristic waiting times.
  • Barkhausen noise in magnetic systems provides a model for studying these complex dynamics.

Purpose of the Study:

  • To investigate the waiting-time statistics in magnetic systems, specifically focusing on Barkhausen noise.
  • To determine how waiting-time distributions are influenced by material thickness, structure, and threshold levels.

Main Methods:

  • Analysis of Barkhausen noise in amorphous and polycrystalline ferromagnetic films of varying thicknesses.
  • Recording and statistical analysis of time series data from magnetic domain wall motion.

Main Results:

  • The study uncovered the specific form of the waiting-time distribution in magnetic systems.
  • Results indicate that waiting-time distributions evolve with film thickness, material structure, and threshold levels.
  • Fingerprints of universality classes for Barkhausen avalanches and dimensional crossover in domain wall dynamics were observed.

Conclusions:

  • The waiting-time statistics in magnetic systems offer insights into temporal avalanche correlations.
  • Findings contribute to understanding the universal behavior of Barkhausen avalanches and domain wall dynamics.