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High-performance writer using high-moment sputtered films in top and bottom poles

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7 Author(s)
Chen, Yingjian ; Read-Rite Corp., Fremont, CA, USA ; Francis Liu ; Stoev, K. ; Xiaozhong Dang
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Sputter-deposited high-moment materials were used in top and bottom poles of a writer that has a pedestal defined zero throat. The high moment materials used were FeRhN/CoZrCr laminated films with a Bs of 20.3 kG. In the top pole, the sputtered materials were used as the flux enhancement layer with a thickness of 0.5 μm. In the bottom pole, the sputtered film forms a pedestal, which has a vertical sidewall at the top to define the zero throat, as well as a tapered foot at the bottom to allow a better flux passage. As a result, the overwrite can be improved by about 9 dB, as compared to heads that employ only conventional Ni45Fe55 electroplated material in top and bottom poles.

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Magnetics, IEEE Transactions on  (Volume:38 ,  Issue: 5 )