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Methods for determination of response times of magnetic head materials

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2 Author(s)
Silva, T.J. ; Nat. Inst. of Stand. & Technol., Boulder, CO, USA ; Crawford, T.M.

Measurements of magnetization response times in thin-film Permalloy are made by both electrical and optical methods. The electrical method measures the inductive voltage generated in a waveguide by the changing magnetization. The optical technique uses standard pump-probe sampling methods combined with the second-harmonic magneto-optic Kerr effect to directly measure magnetization angle as a function of time. Results of these measurements for a 75 nm thick Permalloy film are in good qualitative agreement

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Magnetics, IEEE Transactions on  (Volume:35 ,  Issue: 2 )