Nanodevices for spintronics and methods of using same
AssigneeBrookhaven Science Associates, LLC
InventorsIgor Zaliznyak, Alexei Tsvelik, Dmitri Kharzeev
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Abstract
Graphene magnet multilayers (GMMs) are employed to facilitate development of spintronic devices. The GMMs can include a sheet of monolayer (ML) or few-layer (FL) graphene in contact with a magnetic material, such as a ferromagnetic (FM) or an antiferromagnetic material. Electrode terminals can be disposed on the GMMs to be in electrical contact with the graphene. A magnetic field effect is induced in the graphene sheet based on an exchange magnetic field resulting from a magnetization of the magnetic material which is in contact with graphene. Electrical characteristics of the graphene can be manipulated based on the magnetization of the magnetic material in the GMM.
Claims27
A spintronic device comprising:
- a graphene sheet having first and second surfaces, an electrical property of said graphene sheet being based on a magnetic field effect induced in said graphene sheet;
- and
- at least two electrode terminals electrically coupled to said graphene sheet, said at least two electrode terminals being spaced apart;
- wherein said graphene sheet is configured to conduct an electric signal between said at least two electrode terminals, said graphene sheet configured to affect said electrical signal based on said magnetic field effect induced in said graphene sheet.
An apparatus comprising:
- a spintronic device having at least two electrode terminals and a graphene sheet, said spintronic device configured to conduct an electric signal between at least two electrode terminals and through the graphene sheet in a plane of the sheet, said spintronic device affecting said electrical signal based on a magnetic field effect induced in said graphene sheet, the electrical properties of said graphene sheet being related to said magnetic field effect induced in said graphene sheet.
A method of using a spintronic device having a graphene magnet multilayer (GMM) device comprising:
- supplying an electrical input signal to a first electrode terminal that is in electrical contact with a graphene sheet, said graphene sheet affecting said electrical input signal based on a magnetic field effect induced in said graphene sheet;
- and
- obtaining an electrical output signal at one or more of said at least two electrode terminals in response to said electrical input signal, said electrical output signal being based on said electrical input signal and said magnetic field effect induced in said graphene.
A method of forming a spintronic device comprising:
- disposing a graphene sheet on a substrate;
- contacting said graphene sheet with a first magnetic material;
- disposing at least two electrode terminals on said graphene sheet to provide regions for electrically coupling to said graphene;
- and inducing a magnetization in said first magnetic material.
Dependencies are inferred from the claim text.