Visualization of the Barkhausen Effect by Magnetic Force Microscopy

Alexander Schwarz, Marcus Liebmann, Uwe Kaiser, Roland Wiesendanger, Tae Won Noh, Dong Wook Kim

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

By visualization of the Barkhausen effect using magnetic force microscopy we are able to provide detailed information about the physical principles that govern the magnetization reversal of a granular ferromagnetic thin film with perpendicular anisotropy. Individual Barkhausen volumes are localized and distinguished as either newly nucleated or grown by domain wall propagation. The Gaussian size distribution of nucleated Barkhausen volumes indicates an uncorrelated random process, while grown Barkhausen volumes exhibit an inverse power law distribution, which points towards a critical behavior during domain wall motion.

Original languageEnglish
JournalPhysical Review Letters
Volume92
Issue number7
DOIs
StatePublished - 2004

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