Flux-trapping magnetic films in superconducting circuits
AssigneeNorthrop Grumman Systems Corporation
InventorDaniel Robert Queen
Life of this patent
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Abstract
One example includes a superconducting circuit. The circuit includes superconducting circuitry fabricated in a circuit layer. The circuit layer includes a first surface and a second surface opposite the first surface. The circuit also includes a flux moat comprising a dielectric material formed in the circuit layer. The flux moat can be configured to trap a magnetic flux as the superconducting circuit is cooled to below a superconducting critical temperature. The circuit further includes a magnetic film arranged proximal to the flux moat on at least one of the first and second surfaces of the circuit layer. The magnetic film can be configured to guide the magnetic flux to the flux moat as the superconducting circuit is cooled to below the superconducting critical temperature.
Claims20
A superconducting circuit comprising:
- superconducting circuitry fabricated in a circuit layer, the circuit layer comprising a first surface and a second surface opposite the first surface;
- a flux moat comprising a dielectric material formed in the circuit layer, the flux moat being configured to trap a magnetic flux as the superconducting circuit is cooled to below a superconducting critical temperature;
- and
- a magnetic film arranged proximal to the flux moat on at least one of the first and second surfaces of the circuit layer, the magnetic film being configured to guide the magnetic flux to the flux moat as the superconducting circuit is cooled to below the superconducting critical temperature.
A method for fabricating a superconducting circuit, the method comprising:
- forming superconducting circuitry in a circuit layer, the circuit layer comprising a first surface and a second surface opposite the first surface;
- forming a flux moat comprising a dielectric material in the circuit layer, the flux moat being configured to trap a magnetic flux as the superconducting circuit is cooled to below a superconducting critical temperature;
- and
- depositing a magnetic film proximal to the flux moat on at least one of the first and second surfaces of the circuit layer, the magnetic film being configured to guide the magnetic flux to the flux moat as the superconducting circuit is cooled to below the superconducting critical temperature.
A superconducting circuit comprising:
- superconducting circuitry fabricated in a circuit layer, the circuit layer comprising a first surface and a second surface opposite the first surface;
- a flux moat comprising a dielectric material formed in the circuit layer, the flux moat being configured to trap a magnetic flux as the superconducting circuit is cooled to below a superconducting critical temperature;
- and
- a perpendicular magnetic anisotropy (PMA) material film arranged over the flux moat on at least one of the first and second surfaces of the circuit layer, the PMA material film being configured to guide the magnetic flux to the flux moat as the superconducting circuit is cooled to below the superconducting critical temperature.
Dependencies are inferred from the claim text.