Magnetic memory devices including magnetic layers having different products of saturated magnetization and thickness and related methods
First Claim
1. A magnetic memory device comprising:
- a tunnel barrier;
a reference layer on a first side of the tunnel barrier; and
a free layer on a second side of the tunnel barrier so that the tunnel barrier is between the reference and free layers,wherein the free layer comprises a first magnetic layer adjacent the tunnel barrier, a nonmagnetic layer on the first magnetic layer, and a second magnetic layer on the nonmagnetic layer so that the nonmagnetic layer is between the first and second magnetic layers and so that the first magnetic layer is between the tunnel barrier and the second magnetic layer, andwherein a product of a saturated magnetization of the first magnetic layer and a thickness of the first magnetic layer is less than a product of a saturated magnetization of the second magnetic layer and a thickness of the second magnetic layer.
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Accused Products
Abstract
A magnetic memory device may include a tunnel barrier, a reference layer on a first side of the tunnel barrier, and a free layer on a second side of the tunnel barrier so that the tunnel barrier is between the reference and free layers. The free layer may include a first magnetic layer adjacent the tunnel barrier, a nonmagnetic layer on the first magnetic layer, and a second magnetic layer on the nonmagnetic layer. More particularly, the nonmagnetic layer may be between the first and second magnetic layers, and the first magnetic layer may be between the tunnel barrier and the second magnetic layer. A product of a saturated magnetization of the first magnetic layer and a thickness of the first magnetic layer may be less than a product of a saturated magnetization of the second magnetic layer and a thickness of the second magnetic layer. Related methods are also discussed.
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Citations
20 Claims
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1. A magnetic memory device comprising:
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a tunnel barrier; a reference layer on a first side of the tunnel barrier; and a free layer on a second side of the tunnel barrier so that the tunnel barrier is between the reference and free layers, wherein the free layer comprises a first magnetic layer adjacent the tunnel barrier, a nonmagnetic layer on the first magnetic layer, and a second magnetic layer on the nonmagnetic layer so that the nonmagnetic layer is between the first and second magnetic layers and so that the first magnetic layer is between the tunnel barrier and the second magnetic layer, and wherein a product of a saturated magnetization of the first magnetic layer and a thickness of the first magnetic layer is less than a product of a saturated magnetization of the second magnetic layer and a thickness of the second magnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of storing data using a magnetic memory device structure, the method comprising:
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providing a magnetic tunnel junction (MTJ) structure including a tunnel barrier, a reference layer on a first side of the tunnel barrier, and a free layer on a second side of the tunnel barrier so that the tunnel barrier is between the reference and free layers, wherein the free layer comprises a first magnetic layer adjacent the tunnel barrier, a nonmagnetic layer on the first magnetic layer, and a second magnetic layer on the nonmagnetic layer so that the nonmagnetic layer is between the first and second magnetic layers and so that the first magnetic layer is between the tunnel barrier and the second magnetic layer, and wherein a product of a saturated magnetization of the first magnetic layer and a thickness of the first magnetic layer is less than a product of a saturated magnetization of the second magnetic layer and a thickness of the second magnetic layer; and applying an electrical current through the reference layer, the tunnel barrier, and the free layer to perform a write operation for the MTJ structure. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification