Initial magnetization curve of thin film media

Author

Kawamoto, A. ; Hikami, F. ; Yasuda, S. ; Muto, N.

Author_Institution

Sumitomo Metal Min. Co., Chiba, Japan

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5046

Lastpage

5048

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278735

Filename

278735