Design Considerations Including Rotating Head Technique for Shingled Heat-Assisted Magnetic Recording

Kamal Hosen; R. H. Victora

doi:10.1109/TMAG.2023.3262569

Design Considerations Including Rotating Head Technique for Shingled Heat-Assisted Magnetic Recording

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Abstract

Predictions for signal-to-noise ratio (SNR) and user density (UD) are presented for a large variety of shingled heat-assisted magnetic recording (HAMR) systems. Calculations are performed using a micromagnetic simulation that treats the heated media cells using renormalized spin blocks. Varied parameters include grain pitch (GP), heat spot full width half maximum (FWHM), reader width (RW), and shield-to-shield spacing (SSS). Results are optimized with respect to bit length and GP. Unlike previous work, the base condition features systems already available experimentally (to allow for comparison), extending to media and heads that allow greatly extended capacities. We also discuss the benefits of a rotated read head for these geometries.

Original language	English (US)
Article number	3200807
Journal	IEEE Transactions on Magnetics
Volume	59
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2023.3262569
State	Published - Jun 1 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 1965-2012 IEEE.

Keywords

Heat-assisted magnetic recording (HAMR)
signal-to-noise ratio (SNR)
thermal gradient
transition curvature
user density (UD)

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Design Considerations Including Rotating Head Technique for Shingled Heat-Assisted Magnetic Recording

Abstract

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