Heat-assisted magnetic recording medium and magnetic recording and reading apparatus
AssigneeShowa Denko K.K.
InventorsTetsuya KANBE, Atsushi HASHIMOTO, Takayuki FUKUSHIMA
Life of this patent
Estimating the term…
Abstract
The heat-assisted magnetic recording medium of the present invention has a substrate, an under layer formed on the substrate, and a magnetic layer formed on the under layer, in which the magnetic layer includes an alloy having a L10 structure as a principle component, and the under layer is constituted by a first under layer made of an amorphous alloy or an alloy having a microcrystalline structure, a second under layer made of Cr or an alloy which contains Cr as a principle component and has a BCC structure, a third under layer made of a metal or an alloy having a BCC structure with a lattice constant of 2.98 Å or more, and a fourth under layer made of MgO.
Claims13
A heat-assisted magnetic recording medium comprising:
- a substrate;
- an under layer formed on the substrate;
- and
- a magnetic layer formed on the under layer,
- wherein the magnetic layer includes an alloy having a L10 structure as a principle component, and
- the under layer is constituted by a first under layer made of an amorphous alloy or an alloy having a microcrystalline structure, a second under layer made of Cr or an alloy which contains Cr as a principle component and has a BCC structure, a third under layer made of a metal or an alloy having a BCC structure with a lattice constant of 2.98 Å or more, and a fourth under layer made of MgO.
Dependencies are inferred from the claim text.