Non-volatile magnetic tunnel junction transistor
First Claim
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1. An apparatus for creating a magnetic field, the apparatus comprising:
- a writer including a first magnetic write layer and a second magnetic write layer;
wherein the writer, when energized by a first write voltage, is configured to switch a magnetic anisotropy of the first magnetic write layer from parallel to a plane of the first magnetic write layer to orthogonal to the plane of the first magnetic write layer such that the second magnetic write layer induces a first magnetic field in a region proximate the writer; and
wherein the writer, when energized by a second write voltage, is configured to switch a magnetic anisotropy of the second magnetic write layer from parallel to a plane of the second magnetic write layer to orthogonal to the plane of the second magnetic write layer such that the first magnetic write layer induces a second magnetic field in the region proximate the writer, the second magnetic field being in a direction opposite the first magnetic field.
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Abstract
An example embodiment is an apparatus for controlling a magnetic direction of a magnetic free layer. The apparatus includes a writer with a first magnetic write layer and a second magnetic write layer. Applying a write voltage across first and second magnetic write layers causes a magnetic anisotropy of one of the magnetic write layers to switch from parallel to the plane of the magnetic write layers to orthogonal to the plane of the magnetic write layers. The magnetic write layer with the magnetic anisotropy parallel to the plane of the magnetic write layers induces the magnetic direction in the magnetic free layer.
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Citations
20 Claims
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1. An apparatus for creating a magnetic field, the apparatus comprising:
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a writer including a first magnetic write layer and a second magnetic write layer; wherein the writer, when energized by a first write voltage, is configured to switch a magnetic anisotropy of the first magnetic write layer from parallel to a plane of the first magnetic write layer to orthogonal to the plane of the first magnetic write layer such that the second magnetic write layer induces a first magnetic field in a region proximate the writer; and wherein the writer, when energized by a second write voltage, is configured to switch a magnetic anisotropy of the second magnetic write layer from parallel to a plane of the second magnetic write layer to orthogonal to the plane of the second magnetic write layer such that the first magnetic write layer induces a second magnetic field in the region proximate the writer, the second magnetic field being in a direction opposite the first magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for creating a magnetic field, the method comprising:
applying a write voltage across first and second magnetic write layers such that a magnetic anisotropy of one of the first and second magnetic write layers switches from parallel to a plane of the magnetic write layers to orthogonal to the plane of the magnetic write layers such that the magnetic write layer with the magnetic anisotropy parallel to the plane of the magnetic write layers induces the magnetic field. - View Dependent Claims (12, 15, 16, 17, 18)
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13. The method of clam 11, wherein applying the write voltage across the first and second magnetic write layers comprises:
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applying a first voltage potential to a first write electrode, the first write electrode being electrically coupled to the first magnetic write layer; and applying a second voltage potential to a second write electrode, the second write electrode being electrically coupled to the second magnetic write layer. - View Dependent Claims (14)
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19. A memory cell in an array of memory cells, the memory cell comprising:
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a magnetic tunnel junction (MTJ) including a magnetic free layer, a resistance of the magnetic tunnel junction being dependent on a magnetic direction of the magnetic free layer; and a writer disposed proximate the magnetic tunnel junction, the writer configured to switch a magnetic anisotropy of one of first and second magnetic write layers from parallel to a plane of the magnetic write layers to orthogonal to the plane of the magnetic write layers such that the magnetic write layer with the magnetic anisotropy parallel to the plane of the magnetic write layers induces the magnetic direction in the magnetic free layer. - View Dependent Claims (20)
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Specification