Trailing Shield Head Recording in Discrete Track Media

• Published in: IEEE transactions on magnetics Vol. 42; no. 10; pp. 2408 - 2410
• Main Authors: Greaves, S., Kanai, Y., Muraoka, H.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.10.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Cross-disciplinary physics: materials science; rheology; Density; Disk recording; Exact sciences and technology; Heads; Jitter; Magnetic heads; Magnetic recording; Magnetic shielding; Magnetism; Materials science; Media; Noise levels; Optimization; Other topics in materials science; Permeability; Perpendicular magnetic recording; perpendicular media; Physics; Recording; Saturation magnetization; Shields; Signal to noise ratio; Simulation; Soft magnetic materials; Proceedings; Simulation; perpendicular media; Heads; Recording material; Magnetic recording; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2006.878665

Magnetic recording in perpendicular media using write heads with trailing shields was simulated. The recording performance of discrete track media and continuous media was compared. Trailing shields increase the head field gradient, leading to sharper transitions and higher signal-to-noise ratio (SNR). The optimum trailing shield gap was determined to be 30 nm for both types of media. Using such a write head and subject to the condition of no adjacent track erasure the discrete track media SNR was 1.5 dB higher than the continuous media at a linear density of 1700 kfci