(Fe/sub 0.7/Co/sub 0.3/)/sub 1-x/N/sub x/ (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/sub 0.7/Co/sub 0.3/ 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 /spl mu//spl Omega//spl middot/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.
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Sun et al. (2000) studied this question.