Title :
Magnetic anisotropy of perpendicular media on grooved structure substrate
Author :
Tagami, Katsumichi ; Gokan, Hiroshi ; Mukainaru, Masahito
Author_Institution :
NEC Corp., Kawasaki, Japan
fDate :
11/1/1988 12:00:00 AM
Abstract :
Magnetic anisotropies were investigated for CoCr perpendicular magnetic films on grooved structure substrates (pitch length 2.1 μm) prepared by CF4-reactive-ion etching. Perpendicular magnetic anisotropy decreases in the region where groove depth GD >650 A. The reduction is due to the inclination of the crystal growth axis on the groove surface. In-plane magnetic anisotropy, Ku||, strongly depends on GD and saturation magnetization Ms. In a region of large GD and large Ms, Ku|| is mainly due to shape anisotropy. In a region of small GD and small Ms , Ku|| is caused by perpendicular magnetic anisotropy, in addition to shape and magnetorestrictive anisotropy
Keywords :
chromium alloys; cobalt alloys; ferromagnetic properties of substances; magnetic anisotropy; magnetic recording; magnetic thin films; CoCr; crystal growth axis; grooved structure substrate; magnetic anisotropy; magnetorestrictive anisotropy; perpendicular magnetic films; perpendicular media; pitch length; reactive-ion etching; saturation magnetization; shape anisotropy; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetooptic recording; Magnetostriction; Optical films; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
