Title :
Magnetic properties and high-frequency responses of high moment FeTaN/AlN laminates for high-data-rate magnetic recording
Author :
Hong, Jongill ; Furukawa, Akio ; Sun, Nianxiang ; Wang, Shan X. ; Grimes, Craig A. ; Sahu, Sanghamitra
Author_Institution :
Dept. of Mater. Sci. & Eng., Stanford Univ., CA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
Soft magnetic FeTaN and novel FeTaN/AlN multilayer films with a saturation flux density of ~20 kG are obtained on both planar and sloping substrates. Flat frequency responses extend over 500 MHz for as-deposited 1000 Å-thick FeTaN films. The 3 dB roll-off frequency for as-deposited 1 μm-thick (FeTaN/ AlN)10 laminates is only ~330 MHz. However, when the laminates are patterned into 20 μm-wide strips along the hard axis, the frequency response improves and the 3 dB roll-off frequency is over 500 MHz, which offers the promise of data rates of over 1 Gb/s
Keywords :
aluminium compounds; digital magnetic recording; frequency response; iron compounds; laminates; magnetic flux; magnetic heads; magnetic multilayers; magnetic permeability; magnetic thin films; soft magnetic materials; tantalum compounds; 1 Gbit/s; 20 kG; FeTaN films; FeTaN-AlN; FeTaN/AlN multilayer films; flat frequency responses; frequency response improvement; high moment FeTaN/AlN laminates; high-data-rate magnetic recording; high-frequency responses; magnetic properties; planar substrates; sloping substrates; soft magnetic FeTaN; thin film magnetic heads; Frequency; Laminates; Magnetic films; Magnetic flux; Magnetic moments; Magnetic multilayers; Magnetic properties; Saturation magnetization; Soft magnetic materials; Strips;
Journal_Title :
Magnetics, IEEE Transactions on
