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

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 dec...

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Veröffentlicht in:	IEEE transactions on magnetics 2007-06, Vol.43 (6), p.2301-2303
Hauptverfasser:	Ito, M., Hamaguchi, Y., Takai, Y., Ohashi, K.
Format:	Artikel
Sprache:	eng
Schlagworte:	Anisotropic magnetoresistance Anisotropy Annealing Applied sciences Circumferences Cross-disciplinary physics: materials science rheology Electroless plating Exact sciences and technology Grain size Magnetic anisotropy Magnetic domains Magnetic fields Magnetic films Magnetic noise Magnetism Materials science Metallic coatings Metals. Metallurgy Noise Noise reduction Other topics in materials science Perpendicular magnetic anisotropy perpendicular recording media Physics Production techniques Soft magnetic materials soft magnetic under layer (SUL) Surface treatment Walls
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Beschreibung
Zusammenfassung:	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
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2007.892870