A heat-assisted magnetic recording (HAMR) medium includes a substrate, a split heat-sink structure (SHSS) and a magnetic recording layer. The SHSS includes a first heat-sink layer disposed on the substrate, a heat-sink break layer (HSBL) disposed on the first heat-sink layer, and a second heat-sink layer disposed on the HSBL. The magnetic recording layer is disposed on the SHSS. The SHSS is configured to enable use of a reduced operating current of the laser while maintaining about the same write performance properties as a thermal barrier layer, heat-assisted magnetic recording (TBLHAMR) medium that includes a thermal barrier layer (TBL) and a heat-sink layer that is greater than about 20% thicker than the thickness of the SHSS. A HAMR data storage device that incorporates the HAMR medium within a HAMR disk, and a method for making the HAMR medium are also described.

Disclosed is a device for recording information on a magnetic data storage medium which comprises a magnetic field source designed to be capable of generating a magnetic field in the region where the magnetic data storage medium is arranged; a source of electromagnetic radiation at a matrix of controllable mirrors; and a matrix of controllable mirrors mounted in a housing so as to be capable of reflecting electromagnetic radiation by means of the controllable mirrors into the region where the magnetic data storage medium is arranged and/or in another direction. The present invention makes it possible to record information on a fixed magnetic data storage medium.

Disclosed is a device for recording information on a magnetic data storage medium which comprises a magnetic field source designed to be capable of generating a magnetic field in the region where the magnetic data storage medium is arranged; a source of electromagnetic radiation at a matrix of controllable mirrors; and a matrix of controllable mirrors mounted in a housing so as to be capable of reflecting electromagnetic radiation by means of the controllable mirrors into the region where the magnetic data storage medium is arranged and/or in another direction. The present invention makes it possible to record information on a fixed magnetic data storage medium.

A magnetic medium is described which includes a thin film magnet structure formed of a ferromagnetic alloy or compound. The thin film magnet structure includes one or more ferromagnetic domains and is coupled to one or more optical structures. Each of the one or more ferromagnetic domains have a magnetization that is switchable between two or more states. Each of the one or more optical structures is configured to increase absorbance of light at a target wavelength in the thin film magnet structure, such that in response to illumination of a ferromagnetic domain with continuous-wave light including the target wavelength, that ferromagnetic domain undergoes all-optical magnetic switching.

A magnetic medium is described which includes a thin film magnet structure formed of a ferromagnetic alloy or compound. The thin film magnet structure includes one or more ferromagnetic domains and is coupled to one or more optical structures. Each of the one or more ferromagnetic domains have a magnetization that is switchable between two or more states. Each of the one or more optical structures is configured to increase absorbance of light at a target wavelength in the thin film magnet structure, such that in response to illumination of a ferromagnetic domain with continuous-wave light including the target wavelength, that ferromagnetic domain undergoes all-optical magnetic switching.