Title :
Properties of longitudinal recording process at 100 Gb/in2 and higher areal densities
Author :
Zhang, Zhenyong ; Tarnopolsky, Giora
Author_Institution :
Seagate Technol., Fremont, CA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
A track trimming technique on a spin-stand tester has been used to understand magnetic recording behavior at high areal densities. Bit-error-rate (BER) and signal-to-noise ratio (SNR) were measured over a wide range of linear densities (300-750 kbpi) and trimmed-track widths (2-17 μin) using an advanced head/media system. Monotonic degradation in BER and SNR was observed by increasing the linear density and/or reducing the trimmed-track width (TTW). These two-dimensional variations enable us to understand the necessary improvement needed for future areal densities. It also provides information about the optimal bit aspect ratio (BAR) and electronic/media noise distribution at high linear and track densities
Keywords :
magnetic heads; magnetic recording; magnetic recording noise; 2E-6 to 1.7E-5 inch; bit-error-rate; electronic/media noise distribution; head/media system; high areal densities; linear density; longitudinal recording process; magnetic recording behavior; merged GMR head; monotonic degradation; optimal bit aspect ratio; signal-to-noise ratio; spin-stand tester; track trimming technique; trimmed-track width; Bit error rate; Convolution; Degradation; Density measurement; Magnetic heads; Magnetic recording; Noise measurement; Shape; Signal to noise ratio; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
