A theoretical comparison of detection techniques on R-DAT

Wood, Roger

doi:10.1109/20.104653

Cited by 6 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, an increase in the requirement for the storage of hard disk drives (HDD) beyond 1 Tbit/in 2 requires an ultra-low flying height of the slider [1][2][3]. This prompts a novel and promising system, termed as a heat assisted magnetic recording (HAMR) system, to be developed and widely applied in HDD industry [4,5].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Heat Transfer and Lubricant Depletion in a Heat Assisted Magnetic Recording System with Multilayer Disk Structure

Zeng

Xiao

Zhou

et al. 2012

AMR

View full text Add to dashboard Cite

Heat transfer and lubricant depletion in a HAMR system with multilayer disk substrate are numerically simulated in this study. Cases under two types of multilayer disk substrates with different materials on the top layer as well as different laser powers are examined. The results show the significant effects of the material property and the laser power. Compared with pure glass disk substrate, larger thermal conductivity of top-layer material in the multilayer disk substrate causes faster heat conduction and thus substantial reductions in the temperature increase and lubricant depletion on the top surface. Hence it is necessary and important to incorporate the real multilayer structure in modeling heat transfer and lubricant depletion in practical HAMR systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Study on Heat Transfer and Lubricant Depletion in a Heat Assisted Magnetic Recording System with Multilayer Disk Structure

Zeng

Xiao

Zhou

et al. 2012

AMR

View full text Add to dashboard Cite

show abstract

“…The storage of hard disk drives (HDD) is now expected to beyond 1 Tbit/in 2 , which prompts a novel and promising system, termed as a heat assisted magnetic recording (HAMR) system, to be developed and widely applied [1][2][3]. In a typical HAMR system, a laser pulse is shooting down on the disk surface from the trailing edge of the flying head.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study on Heat Transfer and Lubricant Depletion on an Anisotropic Multilayer Hard Disk

Zeng

Xiao

Zhou

et al. 2012

AMM

View full text Add to dashboard Cite

This paper presents a numerical investigation on the effect of thermal anisotropy of the top layer alloy on heat transfer and lubricant depletion on the disk surface in a heat-assisted magnetic recording (HAMR) system. The disk consists of multilayer structures and a thin layer of lubricant on the top surface. Cases under different laser powers and initial lubricant film thicknesses are examined. The top-layer alloy thermal anisotropy does show non-negligible effect on the heat transfer and lubricant depletion. With the top-layer alloy being more anisotropic, higher temperature increase and lager lubricant depletion can be observed on the disk surface. The results also show that the thermal anisotropy effect is more significant under a lower laser power but nearly keeps no much difference under different initial lubricant film thicknesses. Thus it is of importance to include the thermal anisotropy effect of the top-layer Co-alloy when simulating the heat transfer and lubricant depletion in practical multilayer HMAR systems, especially for the cases under the condition of lower laser power, as the effect cannot be neglected under such conditions.

show abstract

Matched filter limits and code performance in digital magnetic recording

Koren

1991

IEEE Trans. Magn.

View full text Add to dashboard Cite

Absfract. This tutorial-level paper presents a method for evaluating the performance of recording channels and codes for systems with additive spectral Gaussian noise. Startingwith a noise-whitened isolated pulse, matched filters are calculated for the amplitude and timing channels which have the maximum signal-to-noise ratio (SNR) and minimum jitter, respectively. In high density recording systems, the pulse slimming equalization required to control intersymbol interference degrades the SNR and jitter. For the timing channel, a detector SNR, SNRm is defined whose error statistics are nearly identical to the amplitude channel SNR. Procedures for calculating losses relative to the matched filter SNR are developed that facilitate performance comparisons of both channels. A series of runs for the Lorentzian input pulse and cos" equalized output pulses compares the performance of several modulation codes and detection techniques. Write equalization and partial response type 4 equalization are also examined.

show abstract

A theoretical comparison of detection techniques on R-DAT

Cited by 6 publications

References 8 publications

Numerical Study on Heat Transfer and Lubricant Depletion in a Heat Assisted Magnetic Recording System with Multilayer Disk Structure

Numerical Study on Heat Transfer and Lubricant Depletion in a Heat Assisted Magnetic Recording System with Multilayer Disk Structure

A Numerical Study on Heat Transfer and Lubricant Depletion on an Anisotropic Multilayer Hard Disk

Matched filter limits and code performance in digital magnetic recording

Contact Info

Product

Resources

About