Magnetic device and magnetic random access memory
First Claim
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1. A spin-orbit-torque (SOT) magnetic device, comprising:
- a bottom metal layer including a upper layer and a lower layer made of IrMn;
a first magnetic layer, as a magnetic free layer, disposed over the bottom metal layer;
a spacer layer disposed over the first magnetic layer;
a second magnetic layer disposed over the spacer layer; and
an intermediate metal layer disposed between the spacer layer and the second magnetic layer,wherein the first magnetic layer includes a lower magnetic layer, a middle layer made of non-magnetic layer, a first interfacial layer disposed between the lower magnetic layer and the middle layer, an upper magnetic layer and a second interfacial layer disposed between the middle layer and the upper magnetic layer,at least one of the first and second interfacial layers is made of FeB,the intermediate metal layer is a magnesium layer containing Mg more than 99%, anda direction of magnetic field of the lower magnetic layer is perpendicular to a film stack direction and a direction of magnetic field of the upper magnetic layer is parallel to the film stack direction.
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Abstract
A spin-orbit-torque (SOT) magnetic device includes a bottom metal layer, a first magnetic layer, as a magnetic free layer, disposed over the bottom metal layer, a spacer layer disposed over the first magnetic layer, and a second magnetic layer disposed over the spacer layer. The first magnetic layer includes a lower magnetic layer, a middle layer made of non-magnetic layer and an upper magnetic layer.
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Citations
20 Claims
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1. A spin-orbit-torque (SOT) magnetic device, comprising:
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a bottom metal layer including a upper layer and a lower layer made of IrMn; a first magnetic layer, as a magnetic free layer, disposed over the bottom metal layer; a spacer layer disposed over the first magnetic layer; a second magnetic layer disposed over the spacer layer; and an intermediate metal layer disposed between the spacer layer and the second magnetic layer, wherein the first magnetic layer includes a lower magnetic layer, a middle layer made of non-magnetic layer, a first interfacial layer disposed between the lower magnetic layer and the middle layer, an upper magnetic layer and a second interfacial layer disposed between the middle layer and the upper magnetic layer, at least one of the first and second interfacial layers is made of FeB, the intermediate metal layer is a magnesium layer containing Mg more than 99%, and a direction of magnetic field of the lower magnetic layer is perpendicular to a film stack direction and a direction of magnetic field of the upper magnetic layer is parallel to the film stack direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A spin-orbit-torque (SOT) magnetic device, comprising:
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a bottom metal layer; a first magnetic layer, as a free magnetic layer, disposed over the bottom metal layer; a spacer layer disposed over the first magnetic layer; and a second magnetic layer disposed over the spacer layer, wherein the first magnetic layer includes a lower magnetic layer, a middle layer made of non-magnetic layer, an upper magnetic layer, a first interfacial layer between the lower magnetic layer and the middle layer and a second interfacial layer between the middle layer and the upper magnetic layer, and at least one of the first and second interfacial layers is made of FeB. - View Dependent Claims (13)
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14. A spin-orbit-torque (SOT) magnetic device, comprising:
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a bottom metal layer including an antiferromagnetic layer; a first magnetic layer, as a free magnetic layer, disposed under the bottom metal layer; a spacer layer disposed under the first magnetic layer; and a second magnetic layer disposed under the spacer layer, wherein the first magnetic layer includes a lower magnetic layer, a middle layer made of non-magnetic layer, a first interfacial layer disposed between the lower magnetic layer and the middle layer, an upper magnetic layer and a second interfacial layer disposed between the middle layer and the upper magnetic layer, at least one of the first and second interfacial layers is made of FeB, a direction of magnetic field of the lower magnetic layer is tilted by 70-89 degrees with respect to a film stack direction, and the lower magnetic layer is made of a different material than the upper magnetic layer. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification