Voltage-controlled magnetic devices
First Claim
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1. A method of operating a ferromagnetic component, the method comprising:
- providing a ferromagnetic component comprising a ferromagnetic layer and an oxide layer directly on top of the ferromagnetic layer;
applying an adjustable voltage to a conductor on the oxide layer to change a magnetic state of the ferromagnetic layer from a current state to a desired state, the magnetic states available for the desired state include in-plane magnetic anisotropy, perpendicular magnetic anisotropy, and zero magnetization; and
while in the desired state, operating the ferromagnetic component according to its application, wherein the ferromagnetic component comprises an antenna, and wherein operating the ferromagnetic component according to its application comprises receiving or transmitting data via the antenna.
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Abstract
Voltage controlled magnetic components are described. The magnetic components include a thin layer of ferromagnet adjacent to an oxide layer. The magnetic properties of the ferromagnet may be controlled in a reversible manner via application of an external electric field and voltage-induced reversible oxidation of the ferromagnet.
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Citations
18 Claims
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1. A method of operating a ferromagnetic component, the method comprising:
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providing a ferromagnetic component comprising a ferromagnetic layer and an oxide layer directly on top of the ferromagnetic layer; applying an adjustable voltage to a conductor on the oxide layer to change a magnetic state of the ferromagnetic layer from a current state to a desired state, the magnetic states available for the desired state include in-plane magnetic anisotropy, perpendicular magnetic anisotropy, and zero magnetization; and while in the desired state, operating the ferromagnetic component according to its application, wherein the ferromagnetic component comprises an antenna, and wherein operating the ferromagnetic component according to its application comprises receiving or transmitting data via the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless system comprising:
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an antenna comprising a ferromagnetic layer, an oxide layer on the ferromagnetic layer, and a conductive layer on the oxide layer; and an operating controller coupled to the ferromagnetic layer and the conductive layer of the antenna to apply an adjustable voltage to the antenna to generate an electric field in the ferromagnetic layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification