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Noise characteristics in exchange-biased soft underlayers for perpendicular media

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7 Author(s)
Wierman, K.W. ; Seagate Res., Pittsburgh, PA, USA ; Platt, C.L. ; Svedberg, E.B. ; Yu, J.
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The characteristics of exchange-biased soft underlayers (SULs) were investigated using magnetic force microscopy and spin stand measurements with a single-pole (focused ion-beam trimmed gap) writer and magnetoresistive head. The SUL high-moment materials (FeCoB, FeAlN) were exchange biased by using IrMn. Spin stand data on perpendicular media (CoCrPtB) with an exchange-biased FeCoB SUL also showed a low integrated dc erase noise level, demonstrating its potential for use in double-layered perpendicular media

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 6 )