Title :
Shingled Magnetic Recording on Bit Patterned Media
Author :
Greaves, Simon ; Kanai, Yasushi ; Muraoka, Hiroaki
Author_Institution :
RIEC, Tohoku Univ., Sendai, Japan
fDate :
6/1/2010 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2043221
