Perpendicular magnetic film, multilayered film for perpendicular magnetic film and process for producing perpendicular magnetic film
AssigneeToda Kogyo Corporation
InventorKousaku Tamari
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Abstract
Disclosed herein is a perpendicular magnetic film comprising a spinel thin film which is formed on a substrate, which contains Fe as the main ingredient and further contains Co and Ni, and which has a coercive force of less than 3000 Oe, the plane (400) thereof being predominantly oriented in parallel with said substrate, the spacing of the plane (400) being not more than 2.082 .ANG., the molar ratio of Co to Fe being 0.005 to 0.32 and the molar ratio of Ni to Co being at least 0.6.
Claims4
A perpendicular magnetic film comprising a spinel thin film having a spinel crystal structure, consisting essentially of Fe, Co, Ni and O, and having a coercive force of less than 3000 Oe, a saturation magnetization of not less than 200 em.mu./cc and a squareness of not less than 0.20,
- the thin film being formed on a substrate, the plane (400) of the thin film being oriented substantially parallel to said substrate so that the spacing of the plane (400) is not more than 2.082 .ANG., the molar ratio of Co to Fe in the thin film being 0.005 to 0.32 and the molar ratio of Ni to Co in the thin film being not less than 0.6.
Dependencies are inferred from the claim text.