Complex pulsed field magnetization behavior and Walker breakdown in a NiFe thin-film

Burn, D.M.; Atkinson, D.

Abstract

The magnetization behavior of a Permalloy thin-film (nominally Ni81Fe19) was investigated as a function of combined quasistatic and pulsed magnetic fields measured using magneto-optic Kerr effect magnetometry. We observed complex field dependent switching behavior that depends on the relative contributions to the total field of the quasistatic and pulsed fields. As the pulsed field amplitude was increased, complex switching behavior occurs for total fields in excess of the coercive field. A simple phenomenological domain wall propagation model suggests a qualitative understanding of this complex behavior based on Walker breakdown of the domain wall motion occurring in the Permalloy thin-film.

Citation

Burn, D., & Atkinson, D. (2010). Complex pulsed field magnetization behavior and Walker breakdown in a NiFe thin-film. Journal of Applied Physics, 108(7), Article 073926. https://doi.org/10.1063/1.3490233

• Journal Article Type: Article
• Publication Date: Oct 1, 2010
• Deposit Date: Nov 2, 2010
• Publicly Available Date: Oct 9, 2012
• Journal: Journal of Applied Physics
• Print ISSN: 0021-8979
• Electronic ISSN: 1089-7550
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 108
• Issue: 7
• Article Number: 073926
• DOI: https://doi.org/10.1063/1.3490233
• Keywords: Coercive force, Ferromagnetic materials, Kerr magneto-optical effect, Magnetic domain walls, Magnetic switching, Magnetic thin films, Metallic thin films, Permalloy.
• Public URL: https://durham-repository.worktribe.com/output/1514515