Multilayered seed structure for perpendicular MTJ memory element
First Claim
1. A magnetic random access memory element comprising:
- a multilayered seed structure formed by interleaving multiple layers of a first transition metal with multiple layers of a second transition metal; and
a first magnetic layer formed on top of said multilayered seed structure, said first magnetic layer having a multilayer structure formed by interleaving layers of said first transition metal with layers of a magnetic material and having a first fixed magnetization direction substantially perpendicular to a layer plane thereof,wherein said first and second transition metals are non-magnetic.
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Abstract
The present invention is directed to a magnetic random access memory element that includes a multilayered seed structure formed by interleaving multiple layers of a first transition metal with multiple layers of a second transition metal; and a first magnetic layer formed on top of the multilayered seed structure. The first magnetic layer has a multilayer structure formed by interleaving layers of the first transition metal with layers of a magnetic material and has a first fixed magnetization direction substantially perpendicular to a layer plane thereof. The first transition metal is platinum or palladium, while the second transition metal is selected from the group consisting of tantalum, titanium, zirconium, hafnium, vanadium, niobium, chromium, molybdenum, and tungsten.
66 Citations
20 Claims
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1. A magnetic random access memory element comprising:
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a multilayered seed structure formed by interleaving multiple layers of a first transition metal with multiple layers of a second transition metal; and a first magnetic layer formed on top of said multilayered seed structure, said first magnetic layer having a multilayer structure formed by interleaving layers of said first transition metal with layers of a magnetic material and having a first fixed magnetization direction substantially perpendicular to a layer plane thereof, wherein said first and second transition metals are non-magnetic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A magnetic random access memory element comprising:
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a multilayered seed structure formed by interleaving one or more layers of nickel with one or more layers of molybdenum; and a first magnetic layer formed on top of said multilayered seed structure, said first magnetic layer having a first fixed magnetization direction substantially perpendicular to a layer plane thereof. - View Dependent Claims (17, 18, 19, 20)
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Specification