Magnetic anisotropy of perpendicular media on grooved structure substrate

Magnetic anisotropies were investigated for CoCr perpendicular magnetic films on grooved structure substrates (pitch length 2.1 mu m) prepared by CF/sub 4/-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, K/sub u///, strongly depends on GD and saturation magnetization M/sub s/. In a region of large GD and large M/sub s/, Ku/sub /// is mainly due to shape anisotropy. In a region of small GD and small M/sub s/, K/sub u/// is caused by perpendicular magnetic anisotropy, in addition to shape and magnetorestrictive anisotropy.<
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