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

David M. Burn | Zendy; D. Atkinson | Zendy

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

Author(s) -

David M. Burn,

D. Atkinson

Publication year - 2010

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3490233

Subject(s) - permalloy , quasistatic process , condensed matter physics , magnetization , kerr effect , coercivity , materials science , field (mathematics) , phenomenological model , domain wall (magnetism) , magnetic domain , magnetic field , magnetization dynamics , physics , thermodynamics , mathematics , pure mathematics , quantum mechanics , nonlinear system

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

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