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Photothermal characterization of multi-layer magnetic materials

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3 Author(s)
Zhao Qiu Wang ; Sch. of Natural & Environ. Sci., Coventry Univ., UK ; Newman, D.M. ; Carey, R.

In magnetic media thermal transport properties are sensitive to the large internal field associated with the magnetization. Using photoacoustic detection, we show how measurement of the amplitude of thermal waves traversing a magnetic medium provides a technique with the potential to separate the magnetic characteristics of different layers in a multi-layer structure. The technique is demonstrated by recovering the hysteresis loops of magnetic films in tri-layer structures with thick (100 nm) nonmagnetic capping layers

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Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )