Three-dimensional magnetic memory devices
First Claim
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1. A magnetic memory device comprising:
- a cylindrical core;
a first cylindrical ferromagnetic layer that surrounds the cylindrical core;
a spacer layer that surrounds the first cylindrical ferromagnetic layer; and
a second cylindrical ferromagnetic layer that surrounds the spacer layer, wherein the cylindrical core, the first cylindrical ferromagnetic layer, the spacer layer, and the second cylindrical ferromagnetic layer collectively form a magnetic tunnel junction, wherein;
the first cylindrical ferromagnetic layer has a first set of characteristics; and
the second cylindrical ferromagnetic layer has a second set of characteristics that at least partially differ the first set of characteristics;
a magnetic ground state of the first and second cylindrical ferromagnetic layers is based, at least in part, on the first and second sets of characteristics of the first and second cylindrical ferromagnetic layers, respectively; and
the first and second sets of characteristics include;
(i) thicknesses of the first and second cylindrical ferromagnetic layers and (ii) heights of the first and second cylindrical ferromagnetic layers, respectively.
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Abstract
A magnetic memory device is provided. The magnetic memory device includes: (i) a cylindrical core, (ii) a first cylindrical ferromagnetic layer that surrounds the cylindrical core, (iii) a spacer layer that surrounds the first cylindrical ferromagnetic layer, and (iv) a second cylindrical ferromagnetic layer that surrounds the spacer layer. The cylindrical core, the first cylindrical ferromagnetic layer, the spacer layer, and the second cylindrical ferromagnetic layer collectively form a magnetic tunnel junction.
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17 Claims
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1. A magnetic memory device comprising:
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a cylindrical core; a first cylindrical ferromagnetic layer that surrounds the cylindrical core; a spacer layer that surrounds the first cylindrical ferromagnetic layer; and a second cylindrical ferromagnetic layer that surrounds the spacer layer, wherein the cylindrical core, the first cylindrical ferromagnetic layer, the spacer layer, and the second cylindrical ferromagnetic layer collectively form a magnetic tunnel junction, wherein; the first cylindrical ferromagnetic layer has a first set of characteristics; and the second cylindrical ferromagnetic layer has a second set of characteristics that at least partially differ the first set of characteristics; a magnetic ground state of the first and second cylindrical ferromagnetic layers is based, at least in part, on the first and second sets of characteristics of the first and second cylindrical ferromagnetic layers, respectively; and the first and second sets of characteristics include;
(i) thicknesses of the first and second cylindrical ferromagnetic layers and (ii) heights of the first and second cylindrical ferromagnetic layers, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification