Composite magnetic film
AssigneeHitachi, Ltd.
InventorsYutaka Sugita, Tsutomu Kobayashi, Hideki Nishida, Masatake Takahashi
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Abstract
A polycrystalline film made of a ferromagnetic substance is deposited on a magnetic film to form a composite magnetic film. The composite magnetic film, unlike a conventional single-layered magnetic film made only of a Garnet film, is free from development of hard bubbles and has very excellent characteristics as magnetic film for use in a magnetic bubble device.
Claims17
A composite free from development of hard bubbles comprising a magnetic bubble domain film capable of forming hard bubbles and having its easy magnetization axis arranged in a direction perpendicular to the surface thereof and in which uniaxial anisotropy is dominant, and a polycrystalline metallic ferromagnetic film deposited on said magnetic film, said polycrystalline film having a thickness of 30 to 500 angstroms.
A composite free from development of hard bubbles comprising a magnetic bubble domain film capable of generating magnetic bubbles including hard bubbles under the influence of an externally applied magnetic field, the easy magnetization axis of said magnetic bubble domain film being arranged in a direction perpendicular to the surface of said film, uniaxial anisotropy being dominant in said magnetic film, and a polycrystalline metallic ferromagnetic film coated on said magnetic film, said polycrystalline film having a thickness of 30 to 500 angstroms and being selected from the group consisting of Fe, Ni, Co, Fe--Ni alloys, Ni--Co alloys, Fe--Co alloys and Fe--Ni--Co alloys.
Dependencies are inferred from the claim text.