Title :
Initial magnetization curve of thin film media
Author :
Kawamoto, A. ; Hikami, F. ; Yasuda, S. ; Muto, N.
Author_Institution :
Sumitomo Metal Min. Co., Chiba, Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
The authors propose a novel approach for evaluating the signal-to-noise ratio (SNR) characteristics from the magnetic properties of thin film media such as CoCrTa, CoNi, and CoNi(Sm, Cr). The initial magnetization curve on the AC recorded state characterizes the domain wall motion. The maximum slope of (dM/dH)max correlated well with the SNR of the media. Among the tested samples, CoCrTa media showed the best SNR and the largest value of (dm/dH)max. Tantalum segregation observed in and around the CoCrTa grains seemed to enhance the uniform pinning effect and reduce the zig-zag domain formation
Keywords :
chromium alloys; cobalt alloys; magnetic domain walls; magnetic recording; magnetisation; nickel alloys; samarium alloys; tantalum alloys; AC recorded state; CoCrTa; CoNi; CoNiCr; CoNiSm; SNR; domain wall motion; magnetization curve; segregation; signal-to-noise ratio; thin film media; uniform pinning effect; zig-zag domain formation; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic films; Magnetic noise; Magnetization; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Signal to noise ratio; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
