Spin-orbit torque magnetization rotating element, spin-orbit torque magnetoresistance effect element, and magnetic memory
A spin-orbit torque magnetization rotating element includes a spin-orbit torque wiring and a laminated body laminated on the spin-orbit torque wiring. The laminated body includes a first ferromagnetic layer independently having an axis of easy magnetization in a first direction, a nonmagnetic antiferromagnetic coupling layer, and a second ferromagnetic layer independently having an axis of easy magnetization in a second direction, in order from the side of the spin-orbit torque wiring, and the first direction crosses the second direction.
1. A spin-orbit torque magnetization rotating element, comprising:
a spin-orbit torque wiring; and
a laminated body laminated on the spin-orbit torque wiring,
wherein the laminated body includes a first ferromagnetic layer independently having an axis of easy magnetization in a first direction, a nonmagnetic antiferromagnetic coupling layer, and a second ferromagnetic layer independently having an axis of easy magnetization in a second direction, in order from the side of the spin-orbit torque wiring, and
wherein the first direction crosses the second direction.
2. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein the first direction is orthogonal to the second direction.
3. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein the first direction is an in-plane direction of the laminated body, and the second direction is an orthogonal direction of the laminated body.
4. The spin-orbit torque magnetization rotating element according to claim 2 ,
wherein the first direction is an in-plane direction of the laminated body, and the second direction is an orthogonal direction of the laminated body.
5. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein the first direction is an orthogonal direction of the laminated body, and the second direction is an in-plane direction of the laminated body.
6. The spin-orbit torque magnetization rotating element according to claim 2 ,
wherein the first direction is an orthogonal direction of the laminated body, and the second direction is an in-plane direction of the laminated body.
7. The spin-orbit torque magnetization rotating element according to claim 3 ,
wherein the second ferromagnetic layer contains Fe.
8. The spin-orbit torque magnetization rotating element according to claim 4 ,
wherein the second ferromagnetic layer contains Fe.
9. The spin-orbit torque magnetization rotating element according to claim 5 ,
wherein the first ferromagnetic layer contains Co.
10. The spin-orbit torque magnetization rotating element according to claim 3 ,
wherein a film thickness of a ferromagnetic layer having an axis of easy magnetization in an orthogonal direction among the first ferromagnetic layer and the second ferromagnetic layer is thinner than the film thickness of a ferromagnetic layer having an axis of easy magnetization in an in-plane direction.
11. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein a film thickness of the second ferromagnetic layer is thicker than a film thickness of the first ferromagnetic layer.
12. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein the nonmagnetic antiferromagnetic coupling layer contains at least one selected from a group consisting of Ru, Ir, and Rh.
13. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein the laminated body is circular in a plan view.
14. The spin-orbit torque magnetization rotating element according to claim 1 ,
wherein the laminated body in a plan view has shape anisotropy with a major axis and a minor axis.
15. A spin-orbit torque magnetoresistance effect element, comprising:
the spin-orbit torque magnetization rotating element according to claim 1 ;
a nonmagnetic layer laminated on a side opposite to the spin-orbit torque wiring of the laminated body; and
a third ferromagnetic layer with the laminated body and the nonmagnetic layer therebetween.
16. The spin-orbit torque magnetoresistance effect element according to claim 15 ,
wherein magnetic anisotropy of a ferromagnetic layer having an axis of easy magnetization in a same direction as the third ferromagnetic layer among the first ferromagnetic layer and the second ferromagnetic layer is stronger than magnetic anisotropy of a ferromagnetic layer having an axis of easy magnetization in a different direction as the third ferromagnetic layer.
17. A magnetic memory comprising a plurality of spin-orbit torque magnetoresistance effect elements according to claim 15 .