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AssigneeCarnegie Mellon University
InventorsTimothy John Klemmer, Ganping Ju, Rene Johannes Marinus van de Veerdonk, Todd Dennis Leonhardt, David Eugene Laughlin
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Magnetic films having magnetic regions and non-magnetic regions are disclosed. The film is subjected to ion irradiation in order to produce chemically disordered regions in the film. The irradiated disordered regions may correspond to the non-magnetic regions of the film. Alternatively, the irradiated disordered regions may correspond to the magnetic regions of the film. In one embodiment, portions of a magnetic CrPt3 film are converted to non-magnetic regions by irradiating the regions with boron ions which disorder the CrPt3 film in the treated regions. The film may be patterned into magnetic regions and non-magnetic regions for applications such as magnetic recording media in computer disc drive systems.
A magnetic recording medium comprising:
A magnetic recording medium comprising:
An ion irradiated magnetic film comprising magnetic regions and non-magnetic regions, wherein the film comprises an alloy selected from Cr, Mn, Fe and Ni alloys.
A method of making a magnetic film having magnetic and non-magnetic regions, the method comprising subjecting at least a portion of the film to ion irradiation in order to convert regions of the film from a chemically ordered material to a chemically disordered material, thereby producing the magnetic and non-magnetic regions, wherein the film comprises an alloy selected from Cr, Mn, Fe and Ni alloys.
A method of making a magnetic film having magnetic and non-magnetic regions, the method comprising subjecting at least a portion of the film to ion irradiation comprising B ions in order to convert regions of the film from a chemically ordered material to a chemically disordered material, thereby producing the magnetic and non-magnetic regions.
Dependencies are inferred from the claim text.