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Comparison between different methods of determining anisotropy constants of thin film media

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3 Author(s)
Inaba, N. ; Central Res. Lab., Hitachi Ltd., Tokyo, Japan ; Uesaka, Y. ; Futamoto, M.

The magnetic anisotropy Ku value of Co81Cr 15Ta4 polycrystalline thin film medium was determined by using the 45 degree magneto-torque and the rotational hysteresis methods and compared with those of Co-Cr-Ta single crystal films with different Cr contents. The anisotropy field Hk of polycrystalline specimen determined by the rotational hysteresis method is confirmed to be underestimated. The Ku of the Co-Cr-Ta polycrystalline film determined by using the 45 degree magneto-torque method showed a reasonable agreement with that estimated from the single crystal specimen by taking into account of the Cr segregation in the polycrystalline grains

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Magnetics, IEEE Transactions on  (Volume:35 ,  Issue: 5 )