Title :
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
fDate :
6/1/2007 12:00:00 AM
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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.892870
