Three-dimensional (3D) magnetic memory device comprising a magnetic tunnel junction (MTJ) having a metallic buffer layer
First Claim
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1. A magnetic memory device comprising:
- a cylindrical core;
a metallic buffer layer that surrounds the cylindrical core;
a first ferromagnetic layer that surrounds the metallic buffer layer;
a barrier layer that surrounds the first ferromagnetic layer; and
a second ferromagnetic layer that surrounds the barrier layer, wherein the cylindrical core, the metallic buffer layer, the first ferromagnetic layer, the barrier layer, and the second ferromagnetic layer collectively form a magnetic tunnel junction,wherein;
a magnetization of the first ferromagnetic layer parallels an interface of the metallic buffer layer and the first ferromagnetic layer; and
the metallic buffer layer reduces an interfacial anisotropy contribution, resulting from the interface between the metallic buffer layer and the first ferromagnetic layer, to an anisotropy of the first ferromagnetic layer, the interfacial anisotropy being in a direction that is perpendicular to the magnetization of the first ferromagnetic layer.
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Abstract
A magnetic memory device is provided. The magnetic memory device includes: (i) a cylindrical core, (ii) a metallic buffer layer that surrounds the cylindrical core, (iii) a first ferromagnetic layer that surrounds the metallic buffer layer, (iv) a barrier layer that surrounds the first ferromagnetic layer, and (v) a second ferromagnetic layer that surrounds the barrier layer. The cylindrical core, the metallic buffer layer, the first ferromagnetic layer, the barrier layer, and the second ferromagnetic layer collectively form a magnetic tunnel junction.
135 Citations
18 Claims
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1. A magnetic memory device comprising:
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a cylindrical core; a metallic buffer layer that surrounds the cylindrical core; a first ferromagnetic layer that surrounds the metallic buffer layer; a barrier layer that surrounds the first ferromagnetic layer; and a second ferromagnetic layer that surrounds the barrier layer, wherein the cylindrical core, the metallic buffer layer, the first ferromagnetic layer, the barrier layer, and the second ferromagnetic layer collectively form a magnetic tunnel junction, wherein; a magnetization of the first ferromagnetic layer parallels an interface of the metallic buffer layer and the first ferromagnetic layer; and the metallic buffer layer reduces an interfacial anisotropy contribution, resulting from the interface between the metallic buffer layer and the first ferromagnetic layer, to an anisotropy of the first ferromagnetic layer, the interfacial anisotropy being in a direction that is perpendicular to the magnetization of the first ferromagnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification