CrMnPt反強磁性膜を用いたスピンバルブ

概要

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Spin-valve heads with Ta(5nm)/Cr_<45>Mn_<45>Pt_<10>(30nm)/Co(3nm)/Cu(2.5nm)/Co(1nm)/Ni_<20>(5nm)/Ta(5nm) film were fabricated and their read performance was tested. The MR ratio of the spin-valve films and the exchangecoupling field were 6.7% and 320 Oe, respectively. The output relative to the track width was 1mV/um with a sensing current of 4.3mA.With the same senseing current, the readback waveform of the fabricated heads was noise-free and well viased. The temperature depindence of the output was examined for both CrMnPt and NiO spinvalve heads. The output of CrMnPt spin-valve heads at 100℃ was 6% smaller than the output at room temperature.For NiO spin-valve heads, the output at 100 C was 14% lower than at room temperature. The small temperature dependence of the output for CrMnPt spin-valve heads is attributed to the large exchange-coupling field, small temperature dependence of the exchange-coupling field, and high blocking temperature.
社団法人日本磁気学会の論文
1998-04-15