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|Author(s):||Thomas J. Silva; Matthew R. Pufall; Pavel Kabos;|
|Title:||Nonlinear magnetooptic measurement of flux propagation dynamics in thin Permalloy films|
|Published:||March 12, 2003|
|Abstract:||Time-resolved nonlinear optics are used to study the propagation of magnetic flux pulses in a 250 nm Permalloy film. The flux is generated in the film by coupling it to a coplanar waveguide structure driven with broadband voltage pulses. Flux pulses propagated in the film with a phase velocity of 4.2 × 10 5 m/s and a group velocity of 1.5 × 105 n/s. Both velocities are consistent with the predictions of Damon-Eshbach theory for magnetostatic surface waves with 200-300 υm wavelengths. Within 100 υm of the excitation source, flux pulses decayed monotonically but with no measurable delay. © 2002 American Institute of Physics. [DOI:10.1063/1.1421040]|
|Citation:||Journal of Applied Physics|
|Pages:||pp. 1066 - 1073|
|Keywords:||coplanar waveguide,Damon-Eshbach modes,group velocity,magnetic flux pulses,magnetic thin films,magnetostatic surface waves,Permalloy,phase velocity,second-harmonic magnetooptic Kerr effect|
|PDF version:||Click here to retrieve PDF version of paper (192KB)|