PURPOSE: To obtain an excellent characteristic by forming a continuous magnetic layer consisting essentially of iron oxide on an underlying crystal layer suitable for crystal orientation of the magnetic layer at the ratio between the residual magnetization in the direction in the plane of the magnetic layer and the residual magnetization in the direction perpendicular to the plane specified at a specific value.
CONSTITUTION: An underlying crystal layer 11 is formed by using a metal such as Al, Ag or the like, the oxide thereof, or an org. high polymer compd. such as polyethylene terephthalate, polyimide, etc. on a substrate 6. An Al or Ag layer having the high effect of orienting the axis of easy magnetization of a continuous magnetic layer 10 in the direction perpendicular to the layer 10 is particularly formed as the layer 11 in order to obtain the magnetic layer which is MV/MH≥0.5 in the ratio between the residual magnetizations in the direction in the plane of the layer 10 and perpendicular to said plane and is easy to magnetize vertically by forming the high coercive force layer 10 consisting of, for example, Fe3O4, γ-Fe2O3 or the like consisting essentially of iron oxide on the layer 11 by using a sputter device in which opposed targets T1, T2 are used. A high density magnetic recording medium having high sensitivity and a high S/N, and good corrosion resistance without requiring protective film is thus obtd.
| JPS61294627 | MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION |
| JPS60119637 | MANUFACTURE OF MAGNETIC RECORDING MEDIUM |
| JPS62205517 | MAGNETIC MEMORY BODY |
KASANUKI YUUJI
NAOE MASAHIKO
JOURNAL OF CRYSTAL GROWTH=1980
THE 3RD INTERNATIONAL CONFERENCE ON FERRITESSUMMARIES=1980