Back to results
US 2014/0272473 A1Published application
Damping controlled composite magnetic media for heat assisted magnetic recording
AssigneeSeagate Technology LLC
InventorsXi Chen, Yingguo Peng, Jan-Ulrich Thiele, Ganping Ju, Thomas Roscamp
Life of this patent
Estimating the term…
Abstract
A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, α, between about 0.1 to about 1.
Claims21
A magnetic stack, comprising:
- a substrate;
- and
- magnetic recording layer disposed over the substrate and comprising magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains;
- wherein one or both of the magnetic crystalline grains and the segregant are doped with a rare earth metal or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping parameter value, α, between about 0.1 to about 1.
1 more element
A magnetic stack, comprising:
- a substrate;
- and
- magnetic recording layer disposed over the substrate and comprising:
- a first magnetic recording sublayer comprising first magnetic crystalline grains and a first segregant disposed between grain boundaries of the crystalline grains;
- and
- a second magnetic recording sublayer including second magnetic crystalline grains and a second segregant disposed between grain boundaries of the second magnetic crystalline grains,
- wherein one or both of the first magnetic crystalline grains and the first segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with an overall damping value, α, between about 0.1 to about 1.
4 more elements
Dependencies are inferred from the claim text.