Two-Dimensional Magnetic Recording at 10 $\hbox{Tbits/in}^{2}$

Victora, R. H.; Morgan, Sean M.; Momsen, K.; Cho, E.; Erden, M.F.

doi:10.1109/tmag.2011.2173310

Cited by 31 publications

(18 citation statements)

References 15 publications

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“…The main effect and two-interaction effect of the design parameters can be evaluated based on the responses of factorial runs (1)(2)(3)(4)(5)(6)(7)(8), and the quadratic effect can be evaluated based on the axial and center runs (9)(10)(11)(12)(13)(14)(15). Strength of each effect can be indicated by the percentagewise absolute value of the coefficient in RSM model, as shown in Figure 4.…”

Section: Simulation Design Imentioning

confidence: 99%

“…One possible reason is the spatial dependence of the writing field gradient. For a writing head design such as that proposed in [13], the optimal field gradient is confined to a small area in the media plane; thus, the medium coercivity must be carefully designed to achieve improved writing performance.…”

Section: Simulation Design Imentioning

confidence: 99%

“…And the media characteristics should be considered due to the increasing complexity of the microstructure of the BPM. Research efforts focusing on writing heads [12][13][14][15] or BPM [16][17][18] have been extensive. However, their interdependence and the resulting effects on the writing performance, especially considering the magnetic field distribution around the shingled writing corner, have hardly been addressed, partly due to the complex nature of the problem.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we use response surface methodology (RSM) [19] to investigate the interaction effect of the head-head and headmedia parameters on the EWF gradient for SMR-BMP. The writing head is asymmetrically shielded, similar to those studied in [13,15]. However, it includes a slot between the trailing shield and the side shield on the shingled writing side, as suggested in [20].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Writing Field Analysis for Shingled Bit-Patterned Magnetic Recording

Liu

Kang

et al. 2017

Journal of Nanomaterials

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A novel method utilizing response surface methodology (RSM) is proposed for effective analysis of the combined influence of writing head geometry and media properties on writing field performance. The method comprises two main modules: (1) a parametric writing head model based on finite element electromagnetic field analysis and (2) an effective writing field gradient model based on RSM. Using the method proposed, the writing performance of an asymmetrically shielded writing head for shingled magnetic recording on bit-patterned media (SMR-BPM) is analyzed. The results show that the shielding trailing gap and medium coercivity primarily impact the effective writing field (EWF) gradient and that the shielding side gap has a secondary impact. More importantly, the analysis shows a strong interaction effect between the influences of writing head geometry and medium coercivity on the EWF gradient, which indicates the need for inclusive design.

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Section: Simulation Design Imentioning

confidence: 99%

Section: Simulation Design Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Writing Field Analysis for Shingled Bit-Patterned Magnetic Recording

Liu

Kang

et al. 2017

Journal of Nanomaterials

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“…The reader SNR (without including media noise) for sampling per 2 nm was about 21 dB relative to the long wavelength signal, where the noises consist of Johnson noise and magnetization noise [10], [11]. During readback, the playback signal from the conventional MR head is numerically evaluated with the physically accurate reciprocity principle applied to a head magnetic potential from a finite difference code [12], [13]. The reciprocity principle indicates that the playback signal equals the convolution of the head magnetic potential and the divergence of the media magnetization [12].…”

Section: Reader Designmentioning

confidence: 99%

Two-Dimensional Magnetic Recording With a Novel Write Precompensation Scheme for 2-D Nonlinear Transition Shift

2015

Self Cite

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This paper proposes a novel write precompensation scheme that adjusts the current magnitude, not the timing, to mitigate the serious 2-D nonlinear transition shift (NLTS) during the shingled writing process in a two-dimensional magnetic recording (TDMR) system. This scheme calculates the needed optimum write field for the current transition being written by subtracting the demagnetizing field produced by the previous written bits from a fixed write field and determines the optimum writing current based on the minimum mean-squared-error criterion between the needed field and the available fields within an established field library. Such a write precompensation scheme is tested with a micromagnetic writer and exchange coupled composite media, and readback with a rotated reader array combined with a read channel. Simulation indicates that the proposed write precompensation technique can decrease bit error rate compared with the case without write precompensation and approach the performance of a system with negligible NLTS. Correspondingly, the maximum user areal density is increased from 3.2 to 4.1 Tbits/in 2 for a TDMR system with 8 nm Voronoi grains due to the proposed write precompensation.Index Terms-2-D magnetic recording (TDMR), nonlinear transition shift (NLTS), write precompensation.

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Simulation on near-field light on recording medium generated by semiconductor ring resonator with metal nano-antenna for heat-assisted magnetic recording

Katayama

Sugiura²

2020

Opt Rev

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Two-Dimensional Magnetic Recording at 10 $\hbox{Tbits/in}^{2}$

Cited by 31 publications

References 15 publications

Writing Field Analysis for Shingled Bit-Patterned Magnetic Recording

Writing Field Analysis for Shingled Bit-Patterned Magnetic Recording

Two-Dimensional Magnetic Recording With a Novel Write Precompensation Scheme for 2-D Nonlinear Transition Shift

Simulation on near-field light on recording medium generated by semiconductor ring resonator with metal nano-antenna for heat-assisted magnetic recording

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