Magnetic recording medium with amorphous metallic alloy overcoat and magnetic recording apparatus for use therewith

Abstract

Various apparatuses, devices, methods, and media are disclosed for heat-assisted magnetic recording (HAMR) or perpendicular magnetic recording (PMR), wherein a magnetic recording medium is provided that includes an overcoat formed of an amorphous metallic alloy. In some aspects, the overcoat may be formed of one or more of TaAuCrRu, AuRuSiOxC (0≤x≤2), TaCrRuC, NbPdHf, NbPdHfW, NbPdHfSi, PdHfSi and NbPdHfWCrB. In some aspects, the amorphous metallic alloy compound may be an amorphous multi-principal element alloy (MPEA). For example, the amorphous metallic alloy overcoat may be an MPEA formed of 20Pd-20Nb-20Hf-20W-(remainder Cr and B). In other examples, the amorphous metallic alloy of the overcoat has principal elements that each vary from 5 to 35 atomic percentage (at. %) with all elements of the alloy totaling 100 at. %. In one example, the amorphous metallic alloy is 30Pd-11Nb-35Hf-10W-10Cr-4B. In other examples, other amorphous metallic alloy compositions may be suitable, such as families of iridium-containing metallic glasses.

Dependencies are inferred from the claim text.