J.C.S. Kools, W. Kula, et al.
Journal of Applied Physics
Spin-valve sensors of the type Nife/Cu/Co have been designed for optimal biasing behavior and successfully incorporated into a gigabit-type shielded read head configuration with a read trackwidth of 2µm, a read gap of 0.25µm, and a MR sensor height of 1µm. The spin-valve sensor had a structure of 100Å NiFe/25Å Cu/22Å Co/110Å FeMn, and yielded a net spin-valve coefficient of ~3.5% at the completion of head processing. Uniform field testing of the read heads after wafer fabrication and lapping showed quiet and stable spin-valve response with near optimal bias performance. Recording tests of the read heads at a head-disk clearance of 1.5µin showed linear, non-saturated signal response on a media with an areal moment as high as 1.25memu/cm2, yielding reasonably symmetrical signals with peak-to-peak amplitudes ranging from ~750µV/µm to as high as ~1000µV/µm of read trackwidth. Linear density rolloffs and microtrack profiles have also been studied, and results showed behaviors closely agreeing with design targets for high density recording operations. © 1994, American Institute of Physics
J.C.S. Kools, W. Kula, et al.
Journal of Applied Physics
Robert E. Fontana Jr., Jordan A. Katine, et al.
INTERMAG 2002
Grace L. German, Lang Vo, et al.
IEEE Transactions on Magnetics
Ching Tsang, Mao-Min Chen, et al.
IEEE Transactions on Magnetics