摘要:
Procédé de fabrication permettant la croissance par épitaxie par jets moléculaires (MBE) assistée par plasma d'oxygène atomique de couches ultra-minces de ferrites de structure spinelle.
摘要:
A ferrite film is formed by regularly arranging constituents such as magnetized grains or one analogous to that. In the ferrite film, the constituents have at least one of the uniaxial anisotropy and the multiaxial anisotropy. The ferrite film has the magnetic anisotropy or the magnetic isotropy. The ferrite film is formed by the use of the plating method in the presence of a magnetic field. Furthermore, an electromagnetic noise suppressor includes the ferrite film.
摘要:
The invention provides a novel magnetic material having an epitaxially grown single crystalline film of spinel ferrite such as hematite and magnetite as a magnetic layer formed on a substrate. In place of a single crystal substrate of, e.g., magnesium oxide, on which an epitaxial spinel ferrite film is directly grown, the spinel ferrite film in the inventive magnetic material is epitaxially grown on a mica plate as the substrate with intervention of a buffer layer which is a single crystalline thin film of magnesium oxide epitaxially grown on the substrate surface. The thus prepared magnetic material can be used in magnetic devices by virtue of the inexpensiveness and high magnetic properties.
摘要:
There are provided a magnetic thin film utilizing a granular film and having excellent high frequency characteristics and a method of manufacturing the same, and a multilayered magnetic film and magnetic components and electronic equipment utilizing the same. A nonreactive sputtering is performed so that there is no oxidation of a magnetic metal, and a saturation magnetization is increased to increase a resonant frequency of permeability. Also, a multi-target simultaneous sputtering is combined with the nonreactive sputtering so that in a granular structure including magnetic grains and an insulating layer a size of the magnetic grains and a thickness of the insulating layer are optimized thereby ensuring a proper magnitude for a crystalline magnetic anisotropy within the grains and excellent soft magnetic properties. Further, the optimization of the thickness of the insulating layer has the effect of improving a resistivity, decreasing an eddy current and improving an exchange interaction between the magnetic grains.
摘要:
A perpendicular magnetic storage medium comprising a substrate and a perpendicular magnetic anisotropic film formed on the substrate, characterized in that the perpendicular magnetic anisotropic film is a film of a sub-oxide of a metal having a composition described by the general formula [(Fe 1-x Co x ) 1-y M y ] 1-z O z (where 0.01≦x≦0.75, O≦y≦0.30, 0.05#zZ0.50 and M means at least one metal excluding Fe and Co); in that it has an easy magnetization axis being perpendicular to a plane thereof, and in that both a peak of diffracted X-ray intensity caused by oxidized Fe and a peak of diffracted X-ray intensity caused by metal state Fe and Co and Metal M are observed in the X-ray diffraction spectrum. The perpendicular magnetic storage medium of the present invention can be produced easily and economically at a low substrate temperature, and has high wear-resistance, high recording/reproducing sensitivity and high recording density.
摘要:
Mit der Herstellung eines Substratmaterials in Form von Erdalkali-Gallat-Einkristallen ist es möglich geworden, monokristalline Bariumhexaferritschichten von hoher Qualität zu züchten. Diese dünnen Bariumhexaferritschichten auf den genannten Substraten sind als magnetische Anordnung aufgrund ihrer sehr grossen uniaxialen Anisotropie und ihrer kleinen Linienbreite hervorragend geeignet als passive Mikrowellenbauelemente, z.B. als Resonanzisolatoren oder Filter im Zentimeterwellenbereich oder als Bauelement in der Informationsspeichertechnik, z.B. in magnetischen Zylinderdomänenanordnungen, insbesondere im Bereich sehr kleiner (submicron)-Zylinderdomänen.
摘要:
Provided is a magnetic composite including a ferrite layer that is dense, has a relatively large thickness, is excellent in magnetic properties and electrical properties, and further has good adhesion. The magnetic composite includes a metal base material and a ferrite layer provided on a surface of the metal base material. In the magnetic composite, the metal base material has a thickness (d M ) of 20 µm or more, and the ferrite layer has a thickness (d F ) of 2.0 µm or more, contains spinel-type ferrite as a principal component, and has a ratio (I 222 /I 311 ) of 0.00 or more and 0.03 or less, the ratio being of an integrated intensity (I 222 ) of a (222) plane to an integrated intensity (I 311 ) of a (311) plane in X-ray diffraction analysis.