Title :
Soft high saturation magnetization (Fe0.7Co0.3)1-xNx thin films for inductive write heads
Author :
Sun, N.X. ; Wang, S.X.
Author_Institution :
Dept. of Mater. Sci. & Eng., Stanford Univ., CA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
(Fe0.7Co0.3)1-xNx (or FeCoN) alloy single layers and FeCoN film sandwiched between two very thin (5 nm) permalloy layers have been synthesized by RF diode sputtering. The saturation magnetization of the as-deposited FeCoN single layers was found to be around 24.5 kG, the same as the pure Fe 0.7Co0.3 alloy; and the minimum hard-axis coercivity was 5 Oe. In contrast, the sandwiched FeCoN films have a hard axis coercivity of 0.6 Oe, an excellent in-plane uniaxial anisotropy with an anisotropy field of 20 Oe. The optimized FeCoN films exhibit a BCC structure with a strong {110} fiber texture and the resistivity is 55 μΩ·cm. The combination of high saturation and low coercivity, makes the FeCoN films a very promising candidate for the write head materials for future magnetic recording
Keywords :
cobalt alloys; coercive force; ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic heads; magnetic multilayers; soft magnetic materials; sputter deposition; 24.5 kG; 55 muohmcm; BCC structure; Fe0.7Co0.3N; RF diode sputtering; anisotropy field; fiber texture; hard-axis coercivity; in-plane uniaxial anisotropy; magnetic recording; resistivity; saturation magnetization; write head materials; Anisotropic magnetoresistance; Cobalt alloys; Coercive force; Diodes; Iron alloys; Magnetic films; Magnetic materials; Radio frequency; Saturation magnetization; Sputtering;
Journal_Title :
Magnetics, IEEE Transactions on
