Title :
Thin film tape recording heads with high moment FeAlN poles
Author :
Bain, James A. ; Wolfson, Jason ; Kryder, Mark H. ; Yip, Yung ; Reid, James ; Silkensen, Ralph D. ; Dee, Richard H.
Author_Institution :
Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
1/1/1996 12:00:00 AM
Abstract :
In this paper we present results on the fabrication and testing of thin film tape recording heads using high moment FeAlN pole materials (4πMs=20 kGauss). These heads are of the type used in quarter inch cartridge (QIC) tape drives, with a record gap dimension of 1.9 μm and a written track-width of 33 μm. The pole thicknesses ranged from 4 to 4.5 μm with a 14 turn coil. The FeAlN pole material delivers sufficient field to the media surface to saturate 1.5 μm thick Ba-Ferrite media (Hc=1500 Oe). In comparisons to a head of identical design with CoZrTa poles, the FeAlN poles were able to deliver more flux to the media because of a higher head saturation onset current
Keywords :
aluminium compounds; iron compounds; magnetic heads; magnetic tape storage; magnetic thin film devices; 1.9 micron; 33 micron; 4 to 4.5 micron; Ba-ferrite media; FeAlN; FeAlN poles; fabrication; head saturation onset current; high moment pole materials; quarter inch cartridge tape drives; testing; thin film tape recording heads; Coils; Fabrication; Magnetic heads; Material storage; Materials testing; Measurement standards; Sheet materials; Sputtering; Transistors; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
