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AG ALLOY THERMAL DIFFUSION CONTROL FILM USED IN MAGNETIC RECORDING MEDIUM FOR THERMALLY ASSISTED RECORDING, MAGNETIC RECORDING MEDIUM FOR THERMALLY ASSISTED RECORDING, AND SPUTTERING TARGET
AG ALLOY THERMAL DIFFUSION CONTROL FILM USED IN MAGNETIC RECORDING MEDIUM FOR THERMALLY ASSISTED RECORDING, MAGNETIC RECORDING MEDIUM FOR THERMALLY ASSISTED RECORDING, AND SPUTTERING TARGET
Disclosed is a thermal diffusion control film to be used in a magnetic medium for thermally assisted recording, said thermal diffusion control film maintaining a high heat conductivity, and at the same time, having all of a high thermal diffusivity, a smooth surface roughness, and a high heat resistance. The thermal diffusion control film, i.e., an Ag alloy thermal diffusion control film, is composed of an Ag alloy having Ag as a main component, and satisfies a surface roughness (Ra) of 1.0 nm or less, a heat conductivity of 100 W/(m·K) or more, and a thermal diffusivity of 4.0 x 10-5 m2/s or more.
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