Multi-Bit Magnetic Memory Cell
AssigneeRamot at Tel-Aviv University Ltd.
InventorsAlexander Gerber, Amir Segal
Life of this patent
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Abstract
A device (20) for storing data includes at least first and second ferromagnetic films (F1, F2) and a sensing circuit (28). The ferromagnetic films both have perpendicular magnetic anisotropy that is configured responsively to the stored data, and are connected so that an electrical current traverses the first and second ferromagnetic films and generates respective first and second extraordinary Hall voltages therein. The sensing circuit is configured to read out the stored data by measuring the first and second extraordinary Hall voltages.
Claims32
A device for storing data, comprising:
- at least first and second ferromagnetic films, which both have perpendicular magnetic anisotropy that is configured responsively to the stored data, and which are connected so that an electrical current traverses the first and second ferromagnetic films and generates respective first and second extraordinary Hall voltages therein;
- and
- a sensing circuit, which is configured to read out the stored data by measuring the first and second extraordinary Hall voltages.
A method for data storage, comprising:
- providing at least first and second ferromagnetic films, which are connected to one another and both have perpendicular magnetic anisotropy;
- storing data in the first and second ferromagnetic films by configuring the perpendicular magnetic anisotropy of the films responsively to the data, so that an electrical current traverses the first and second ferromagnetic films and generates respective first and second extraordinary Hall voltages therein;
- and
- reading out the stored data by measuring the first and second extraordinary Hall voltages.
28-30. (canceled)
Apparatus, comprising:
- a first Hall sensor having a first terminal, a second terminal, a third terminal and a fourth terminal;
- a second Hall sensor having a fifth terminal, a sixth terminal, a seventh terminal and an eighth terminal;
- a conductor connecting the third terminal to the fifth terminal;
- and
- a processor, which is configured to measure a first potential between the fourth terminal and the sixth terminal while transferring a first current from the first terminal to the seventh terminal via the conductor, to measure a second potential between the first terminal and the seventh terminal while transferring a second current from the fourth terminal to the sixth terminal via the conductor, and to determine a resultant voltage generated by the first and second Hall sensors in response to the first and second potentials.
34-43. (canceled)
Dependencies are inferred from the claim text.