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- W2068226401 abstract "In this article, nonlinear distortions of the playback giant magnetic resonance (GMR) sensor in perpendicular recording are characterized in both time and frequency domains. We use three perpendicular media with different Mrt (0.46, 0.6, and 0.8 emu/cm2) and two groups of similar magnetic-read width (MRW) but different junction type [contiguous junction (CJ) and lead-over-lay (LOL)] GMR heads. Square-wave patterns at moderate densities are recorded to minimize NLTS, partial erasure, and transition broadening effects. Both time- and frequency-domain measurements indicate that the LOL-type GMR heads show playback nonlinearity (7%–23%), while the CJ-type GMR heads do not. Micromagnetic simulation is utilized to understand the hard bias field with different junction designs. The result indicates that the hard bias (HB) field in LOL type (HB field ∼6.9 Oe) at the air bearing surface (ABS) and stripe center is much lower than that in CJ type (HB field ∼54.0 Oe). Therefore, the free layer with large HB–HB distance will be more susceptible to saturation." @default.
- W2068226401 created "2016-06-24" @default.
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- W2068226401 date "2003-05-09" @default.
- W2068226401 modified "2023-10-16" @default.
- W2068226401 title "Experimental study of playback giant magnetic resonance head nonlinearity in perpendicular recording" @default.
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- W2068226401 doi "https://doi.org/10.1063/1.1557717" @default.
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