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Control of asymmetry of spin valve heads based on micromagnetic analysis

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4 Author(s)
Yamada, K.-i. ; File Memory Lab., Fujitsu Labs. Ltd., Kanagawa, Japan ; Kanai, Hitoshi ; Uehara, Yuji ; Toda, Junzo

Relationship between the asymmetry of spin-valve heads and various parameters is revealed by systematical investigations of a micromagnetic analysis. We design spin-valve heads with a good asymmetry by canting the pinned layer. However, for spin-valve heads for high density recording over 10 Gb/in2, a poor asymmetry caused by the degeneration of the magnetization direction of the free layer becomes a serious problem. To solve this problem, we introduce a bias compensation layer (BCL) to the spin-valve structure. We prove that BCL is very effective in controlling the asymmetry

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Magnetics, IEEE Transactions on  (Volume:34 ,  Issue: 4 )