Thin Film Application in Magnetic Recording - NCCAVS - User Groups

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TMR Barrier from Year 2004Large MgO TMR Ratio Observeddue to Spin Filtering EffectCoFe 16 /MgO/CoFe 16(100) oriented crystalline Co/MgO/Co-Crystalline MgO barriersact as a spin filter à LargeTMR (> 100%).- Low electron effectivemass à Low electricalresistanceW.Butler, Zheng et al2001/ 2004IBM S.Parkin 2004Δ 1 state decays rapidlyin antiparallel alignmentFe/MgO/FeΔ 2 and Δ 5 states are filteredout by barrierAIST Y. Yuasa 2004© 2012 HGST, a Western Digital company HGST ConfidentialZ. Gao10
Thin Film Read Magnetic SensorMgO TMR Ratio Highly Sensitive toBarrier Process and Chamber Condition /Target QualitySputter Condition Annealing Condition Surface RoughnessStack:Sub/Ta5/UL50/Ta5/NiFe5/IrMn8/CoFe2/Ru8/CoFeB3/MgO/CoFeB30/Ta5/Ru15 (nm)Tohoku Univ. and Hitachi Ltd.© 2012 HGST, a Western Digital company HGST ConfidentialZ. Gao11
Page 1 and 2: Thin Film Application inMagnetic Re
Page 3 and 4: Perpendicular Recording Head and Me
Page 5 and 6: Read Head and Read SensorFujitsu Re
Page 7 and 8: Read Sensor General Structure and F
Page 9: Thin Film Oblique DepositionMagneti
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Thin Film Application in Magnetic Recording - NCCAVS - User Groups

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