Thermally stable Au alloys as a heat diffusion and plasmonic underlayer for heat-assisted magnetic recording (HAMR) media

摘要

According to one embodiment, a magnetic medium includes a plasmonic underlayer having an Au alloy, where the Au alloy includes one or more alloying components that are substantially immiscible in Au; and a magnetic recording layer above the plasmonic underlayer. According to another embodiment, a magnetic medium, includes a multilayered plasmonic underlayer; and a magnetic recording layer above the multilayered plasmonic underlayer.

主权项

1. A magnetic medium, comprising:
a first plasmonic underlayer comprising a first Au alloy, wherein the first Au alloy comprises one or more alloying components that are substantially immiscible in Au; a second plasmonic underlayer comprising a second Au alloy, wherein the second Au alloy comprises one or more alloying components that are substantially immiscible in Au; and a magnetic recording layer above the plasmonic underlayers, wherein at least of one of the alloying components of the first Au alloy is different than at least one of the alloying components of the second Au alloy, wherein the first and second plasmonic underlayers each have a thermal conductivity of at least about 30 W/m-K.