SPIN-VALVE SENSORS WITH DOMAIN CONTROL HARD MAGNET LAYERS

被引:20
作者
KANAI, H
KANE, J
AOSHIMA, K
KANAMINE, M
UEHARA, Y
机构
[1] Fujitsu Limited, Atsugi, 243-01, 10-1, Morinosato Wakamiya
关键词
D O I
10.1109/20.490069
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We have fabricated unshielded narrow-track NiFe/Cu/NiFe/FeMn spin-valve sensors with a height of 2 mu m and a track-width of less than 2 mu m using CoCrPt hard magnets (4 pi Mr= 5500 G, Hc= 1000 Oe) as a domain control layer. Barkhausen noise was completely suppressed by a longitudinal biasing field from the CoCrPt layers. The bias state was improved by applying a strong ferromagnetic exchange coupling field of 30 Oe between the free and pinned NiFe layers through a 14 Angstrom-thick Cu interlayer. We have also fabricated shielded CoCrPt magnet-biased spin-valve read heads with a track-width of 1.7 mu m. The heads had no Barkhausen noise and very low crosstalk noise.
引用
收藏
页码:2612 / 2614
页数:3
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