Magnetic recording medium

G - Physics – 11 – B

Patent

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G11B 5/66 (2006.01)

Patent

CA 2398950

A magnetic recording disk has a magnetic recording layer formed on a special multilayered "host" layer (30). The host layer comprises at least two ferromagnetic films (32, 34) that are exchange-coupled antiferromagnetically (AF) to one another across a nonferromagnetic spacer film so that their magnetic moments are oriented antiparallel. The magnetic recording layer (25) has a different composition from the top ferromagnetic film in the host layer and is ferromagnetically coupled to the top ferromagnetic film of the host layer.

Disque d'enregistrement magnétique possédant une couche d'enregistrement magnétique située sur une couche "hôte" (30) spéciale comportant des stratifications multiples. Cette couche hôte est composée au moins de deux couches minces ferromagnétiques (32, 34) présentant un couplage d'échange antiferromagnétique (AF) l'une par rapport à l'autre au moyen d'une couche mince d'espacement non ferromagnétique, de sorte que leurs couples magnétiques sont orientés de façon non parallèle. La couche d'enregistrement magnétique (25) possède une composition différente de celle de la couche mince supérieure ferromagnétique de la couche hôte et présente un couplage ferromagnétique avec la couche mince ferromagnétique supérieure de la couche hôte.

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