Barkhausen noise visualized in real space

Alexander Schwarz; Marcus Liebmann

doi:10.1117/12.609316

23 May 2005 Barkhausen noise visualized in real space (Invited Paper)

Alexander Schwarz, Marcus Liebmann

Proceedings Volume 5843, Fluctuations and Noise in Materials II; (2005) https://doi.org/10.1117/12.609316
Event: SPIE Third International Symposium on Fluctuations and Noise, 2005, Austin, Texas, United States

Abstract

During magnetization reversal of ferromagnets random flux changes occur, which are responsible for the Bark-hausen noise. Using magnetic force microscopy, this noise can be visualized in real space so that individual Barkhausen events can be distinguished and analyzed with respect to size and location. Reducing the external field from saturation to zero in a granular ferromagnetic La_0.7Sr_0.3MnO₃ thin film, the observed power law size distribution of growth events is discussed with respect to self-organized criticality and domain wall motion through a disordered medium.

Citation Download Citation

Alexander Schwarz and Marcus Liebmann "Barkhausen noise visualized in real space (Invited Paper)", Proc. SPIE 5843, Fluctuations and Noise in Materials II, (23 May 2005); https://doi.org/10.1117/12.609316

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