Intermediate layer for perpendicular magnetic recording media
AssigneeSeagate Technology LLC
InventorsBin Lu, Dieter K. Weller
Life of this patent
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Abstract
A perpendicular magnetic recording medium includes a hard magnetic recording layer, a soft magnetic layer and a non-magnetic intermediate layer between the hard magnetic recording layer and the soft magnetic layer. The non-magnetic intermediate layer comprises a seedlayer formed adjacent the soft magnetic layer and an underlayer formed between the seedlayer and hard magnetic recording layer. The underlayer comprises Ru or CrRu. The seedlayer comprises CoCrRu, CoCr, W, Ta, Mo, Hf, or Ti. The non-magnetic intermediate layer provides a means for inducing a substantially (00.2) orientation in the hard magnetic recording layer.
Claims32
A perpendicular magnetic recording medium, comprising:
- a hard magnetic recording layer;
- a soft magnetic layer;
- and
- a non-magnetic intermediate layer between said hard magnetic recording layer and said soft magnetic layer, said non-magnetic intermediate layer comprising:
- a seedlayer formed adjacent said soft magnetic layer;
- and
- an underlayer formed between said seedlayer and said hard magnetic recording layer, said underlayer comprising Ru or CrRu.
A magnetic disc drive storage system, comprising:
- a magnetic recording head having an air bearing surface;
- and
- a perpendicular magnetic recording medium positioned adjacent said air bearing surface of said magnetic recording head, said perpendicular magnetic recording medium comprising a hard magnetic recording layer, a soft magnetic layer and a non-magnetic intermediate layer between said hard magnetic recording layer and said soft magnetic layer, wherein a distance between said air bearing surface of said magnetic recording head and said soft magnetic layer is in the range of about 10 nm to about 60 nm.
A thin film structure, comprising:
- a first magnetic layer;
- a second magnetic layer;
- and
- a non-magnetic intermediate layer between said first magnetic layer and said second magnetic layer, said non-magnetic intermediate layer including means for inducing a substantially (00.2) orientation in said first magnetic layer.
A thin film structure, comprising:
- a hard magnetic layer;
- a soft magnetic layer;
- and
- a non-magnetic intermediate layer between said hard magnetic layer and said soft magnetic layer, said non-magnetic intermediate layer comprising:
- a seedlayer formed adjacent said soft magnetic layer;
- and
- an underlayer formed between said seedlayer and said hard magnetic layer, said underlayer comprising Ru or CrRu.
Dependencies are inferred from the claim text.