Title :
Correlation of ATI and SNR Decay in Magnetic Recording
Author :
Shi, Zhupei ; Zhang, Jane ; Yang, Aria ; Duan, Shanlin ; Johnson, Kenneth
Author_Institution :
HGST, Western Digital Co., San Jose, CA, USA
Abstract :
We developed a multitrack average amplitude profile method to study adjacent track interference (ATI) in perpendicular magnetic recording. We have integrated a ATI test module into our spin stand. The consequence of demagnetization field on the thermal decay is characterized by signal-to-noise ratio (SNR) decay. The correlation between ATI and SNR decay suggests that the ATI is thermally activated decay.
Keywords :
disc drives; hard discs; magnetic recording; ATI decay; SNR decay; adjacent track interference; multitrack average amplitude profile method; perpendicular magnetic recording; signal-to-noise ratio; thermally activated decay; Demagnetization; Magnetic heads; Media; Perpendicular magnetic recording; Signal to noise ratio; Writing; Adjacent track interference (ATI); demagnetization field; perpendicular magnetic recording (PMR); signal-to-noise ratio (SNR) decay; stray field;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2200467
