Ferromagnetically coupled magnetic recording media
First Claim
Patent Images
1. A magnetic recording medium, comprising;
- a first ferromagnetic layer;
a second ferromagnetic layer; and
a ferromagnetic coupling layer to ferromagnetically couple said first ferromagnetic layer to said second ferromagnetic layer.
5 Assignments
0 Petitions
Accused Products
Abstract
A ferromagnetically coupled magnetic recording medium having a first ferromagnetic layer, a second ferromagnetic layer, and a ferromagnetic coupling layer to ferromagnetically couple the first ferromagnetic layer to the second ferromagnetic layer is used as stable magnetic media with high MrT in high density recording hard drives. The first ferromagnetic layer is the stabilization layer and the second ferromagnetic layer is the main recording layer. The ferromagnetic coupling layer comprises a conductive material having a thickness which produces ferromagnetic coupling between said first ferromagnetic layer and said second ferromagnetic layer via the RKKY interaction.
69 Citations
26 Claims
-
1. A magnetic recording medium, comprising;
-
a first ferromagnetic layer;
a second ferromagnetic layer; and
a ferromagnetic coupling layer to ferromagnetically couple said first ferromagnetic layer to said second ferromagnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A magnetic recording medium, comprising;
-
a first ferromagnetic layer;
a first interface layer;
a ferromagnetic coupling layer;
a second interface layer;
a second ferromagnetic layer; and
wherein said ferromagnetic coupling layer is used to ferromagnetically couple said first ferromagnetic layer and said second ferromagnetic layer. - View Dependent Claims (19, 20)
-
-
21. A magnetic recording medium, comprising;
-
a first ferromagnetic layer;
a second ferromagnetic layer a ferromagnetic coupling layer for ferromagnetically coupling said first ferromagnetic layer to said second ferromagnetic layer; and
wherein said ferromagnetic coupling layer is anti-ferromagnetically coupled to both said first ferromagnetic layer and said second ferromagnetic layer. - View Dependent Claims (22, 23, 24)
-
-
25. A magnetic recording medium, comprising;
-
a first ferromagnetic structure further comprising a CoCrPtB layer and Co layer;
a second ferromagnetic structure further comprising a Co layer and a CoCrPtB layer; and
a ferromagnetic coupling structure for ferromagnetically coupling said first ferromagnetic layer to said second ferromagnetic layer, said ferromagnetic coupling structure further comprising a first Ru layer, a Co layer, and a second Ru layer.
-
-
26. A disc drive, comprising:
-
a magnetic recording media including a protective overcoat layer;
a motor for spinning said magnetic media about its center;
a transducer for reading and writing on said magnetic media while said magnetic media is rotated about by said motor; and
wherein said magnetic recording media further comprising;
a first ferromagnetic layer;
a second ferromagnetic layer; and
a ferromagnetic coupling layer to ferromagnetically couple said first ferromagnetic layer to said second ferromagnetic layer.
-
Specification