Noise Reduction of the Electroless Plated Soft Magnetic Under Layers by Annealing in a Magnetic Field

Author

Ito, Masaru ; Hamaguchi, Yu ; Takai, Yasushi ; Ohashi, Ken

Author_Institution

Magnetic Mater. Res. Center, Shin-Etsu Chem. Co., Ltd, Fukui

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2301

Lastpage

2303

Abstract

The electroless plated soft magnetic under layer (SUL) film with low magnetic noises was developed by annealing in a magnetic field to add planar anisotropies, such as radial or circumferential directions. The grain size reduction by increasing B content in a SUL film is found to be effective to decrease the noise power. Radial anisotropy SULs show lower noises than circumferential anisotropy SULs. On the contrary, many spike noises are detected at the positions of magnetic domain walls in radial anisotropy SULs

Keywords

magnetic annealing; magnetic domain walls; magnetic fields; magnetic noise; magnetic recording; magnetic thin films; circumferential anisotropy; electroless plated soft magnetic under layer film; magnetic domain walls; magnetic field annealing; noise reduction; planar anisotropies; radial anisotropy; spike noises; Anisotropic magnetoresistance; Annealing; Grain size; Magnetic anisotropy; Magnetic fields; Magnetic films; Magnetic noise; Noise reduction; Perpendicular magnetic anisotropy; Soft magnetic materials; Electroless plating; magnetic anisotropy; magnetic noise; perpendicular recording media; soft magnetic under layer (SUL);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.892870

Filename

4202778