Shingled Magnetic Recording on Bit Patterned Media

Author

Greaves, Simon ; Kanai, Yasushi ; Muraoka, Hiroaki

Author_Institution

RIEC, Tohoku Univ., Sendai, Japan

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1460

Lastpage

1463

Abstract

Shingled magnetic recording on bit patterned media with areal densities of 2-4 Tbit/in² is examined. The use of a shingled recording scheme allows wider write poles and dots with higher anisotropy to be used. The down-track and cross-track write margins can be tailored to suit the tolerances of the drive by varying the bit cell aspect ratio. Readback waveforms are calculated for sensors of various size, including the effect of thermal noise in the sensor, and the combination of a wide sensor and bit aspect ratio (BAR) of 1:1 is found to give the highest SNR.

Keywords

magnetic anisotropy; magnetic recording; magnetic sensors; thermal noise; areal density; bit aspect ratio; bit cell aspect ratio; bit patterned media; cross-track write margin; dots; down-track write margin; magnetic anisotropy; readback waveforms; sensors; shingled magnetic recording; thermal noise effect; write poles; Anisotropic magnetoresistance; Magnetic fields; Magnetic heads; Magnetic recording; Manufacturing; Nanometers; Perpendicular magnetic recording; Signal to noise ratio; Thermal stability; Writing; Bit patterned perpendicular media; heads; magnetic recording; simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2043221

Filename

5467475