Data media with tuned thermal conductivity and magnetic permeability

摘要

Various magnetic stack embodiments may be constructed with a soft magnetic underlayer (SUL) having a first thickness disposed between a substrate and a magnetic recording layer. A heatsink may have a second thickness and be disposed between the SUL and the magnetic recording layer. The first and second thicknesses may each be tuned to provide predetermined thermal conductivity and magnetic permeability throughout the data media.

主权项

1. A heat-assisted perpendicular magnetic recording medium comprising:
a soft magnetic underlayer (SUL); a diffusion barrier layer supported by the SUL; and a thermally conductive heatsink supported by the diffusion barrier layer, the heatsink having a non-zero permeability, the diffusion barrier layer configured to reduce interdiffusion of atoms between the SUL and the heatsink; and a magnetic recording layer supported by the heatsink.