Magnetic recording medium and its fabrication method

Details Magnetic recording medium and its fabrication method Magnetic recording medium and its fabrication method

G - Physics

11

B

G11B 5/706 (2006.01) G11B 5/64 (2006.01) G11B 5/708 (2006.01)

Patent

CA 2071348

This disclosure deals with a magnetic recording medium suitable for longitudinal recording, such medium having low medium noise and high coercivity. The medium includes a substrate and a magnetic layer formed on the substrate. The magnetic layer consists of a mixture of a magnetic alloy and a non-magnetic compound. The magnetic alloy is based on Co, Fe, or, Co-Fe, and the non-magnetic compound is selected from a group of oxides and nitrides such as, for example, silicon, zirconium, tantalum, boron, titanium and aluminum. The volume percentage of the non-magnetic compound in the entire volume of the mixed magnetic alloy and non-magnetic compound is preferably not less than about 2% and not more than about 30%.

Support d'enregistrement magnétique se prêtant à la réalisation d'enregistrements longitudinaux, notamment des supports d'enregistrement à bruit faible ou moyen et d'une grande coercitivité. Le support comprend un substrat et une couche magnétique formée sur ce substrat. La couche magnétique est composée d'un mélange d'alliage magnétique et d'un composé non magnétique. Du Co, du Fe ou du Co-Fe entrent dans la composition de l'alliage magnétique; le composé non magnétique est choisi parmi un groupe d'oxydes et de nitrures comme, par exemple, du silicium, du zirconium, du tantale, du boron, du titanium et de l'aluminium. Il est préférable que le pourcentage du volume du composé non magnétique représente au moins environ 2 % et au plus 30 % de tout le volume du mélange d'alliage magnétique.

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