Magnetic recording medium and magnetic recording device

Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media

Reexamination Certificate

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Reexamination Certificate

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07125615

ABSTRACT:
The magnetic recording medium includes a seed layer and a magnetic recording layer formed on the seed layer. The magnetic recording layer is provided with a plurality of laminated layers and a noble metal layer. The laminated layer includes a transition metal element layer and a platinum group element layer. The noble metal layer is interposed between the laminated layers. The magnetic recording medium satisfies the relational expression 0<Y/X≦1.0, where X is the thickness of the seed layer, and Y is the sum total of the thickness of the noble metal layer in the magnetic recording layer.

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Ohmori H. and Maesaka A. “Magnetic Properties of a Co/Pd Artificial Super-Lattice Deposited on Single-Crystal MgO.”Sony Corporation Core Technology&Network Company Core Technology Development Center, vol. 26, No. 4, 2002.
Asahi, T. et al. “Preparation of Co/Pd Multilayer Perpendicular Magnetic Recording Media with Carbon Under Layer.”Kagami Memorial Laboratory for Materials Science and Technology, vol. 25, No. 4-2, 2001 pp. 575-578.

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