Spin current assisted magnetoresistance effect device
A spin current assisted magnetoresistance effect device includes: a spin current assisted magnetoresistance effect element including a magnetoresistance effect element part and a spin-orbit torque wiring; and a controller electrically connected to the spin current assisted magnetoresistance effect element. In a portion in which the magnetoresistance effect element part and the spin-orbit torque wiring are bonded, an STT inversion current flowing through the magnetoresistance effect element part and an SOT inversion current flowing through the spin-orbit torque wiring merge or are divided, and the controller is configured to be capable of performing control for applying the STT inversion current to the spin current assisted magnetoresistance effect element at the same time as an application of the SOT inversion current or a time application of the SOT inversion current.
1. A spin current assisted magnetoresistance effect device comprising:
a spin current assisted magnetoresistance effect element including a magnetoresistance effect element part, which includes a first ferromagnetic metal layer configured for a magnetization direction to be fixed, a second ferromagnetic metal layer configured for a magnetization direction to be changed, and a nonmagnetic layer interposed between the first ferromagnetic metal layer and the second ferromagnetic metal layer, and a spin-orbit torque wiring extending in a direction intersecting a lamination direction of the magnetoresistance effect element part and bonded to the second ferromagnetic metal layer; and
a controller electrically connected to the magnetoresistance effect element part of the spin current assisted magnetoresistance effect element and the spin-orbit torque wiring,
wherein, in a portion in which the magnetoresistance effect element part of the spin current assisted magnetoresistance effect element and the spin-orbit torque wiring are bonded, an STT inversion current flowing through the magnetoresistance effect element part and an SOT inversion current flowing through the spin-orbit torque wiring merge or are divided, and
wherein the controller is configured to be capable of performing control for applying the STT inversion current to the spin current assisted magnetoresistance effect element at the same time as an application of the SOT inversion current or at a time after an application of the SOT inversion current.
2. The spin current assisted magnetoresistance effect device according to claim 1 , wherein the controller is configured to be capable of performing control for stopping an application of the STT inversion current to the spin current assisted magnetoresistance effect element at a time after an application of the SOT inversion current.
3. The spin current assisted magnetoresistance effect device according to claim 1 , wherein the controller is configured to be capable of performing control for stopping an application of the SOT inversion current at a time after an application of the STT inversion current to the spin current assisted magnetoresistance effect element or a time that is simultaneous with the application.
4. The spin current assisted magnetoresistance effect device according to claim 1 , wherein a time until stopping the application of the SOT inversion current and the STT inversion current after an application of the SOT inversion current is 10 nsec or less.
5. The spin current assisted magnetoresistance effect device according to claim 1 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
6. The spin current assisted magnetoresistance effect device according to claim 1 , wherein a current density of the STT inversion current applied by the controller is lower than a threshold inversion current density required for reversing the magnetization of the second ferromagnetic metal layer of the magnetoresistance effect element part.
7. The spin current assisted magnetoresistance effect device according to claim 1 , wherein a tail time until the applied SOT inversion current becomes zero is shorter than a tail time until the applied STT inversion current becomes zero.
8. The spin current assisted magnetoresistance effect device according to claim 2 , wherein the controller is configured to be capable of performing control for stopping an application of the SOT inversion current at a time after an application of the STT inversion current to the spin current assisted magnetoresistance effect element or a time that is simultaneous with the application.
9. The spin current assisted magnetoresistance effect device according to claim 2 , wherein a time until stopping the application of the SOT inversion current and the STT inversion current after an application of the SOT inversion current is 10 nsec or less.
10. The spin current assisted magnetoresistance effect device according to claim 3 , wherein a time until stopping the application of the SOT inversion current and the STT inversion current after an application of the SOT inversion current is 10 nsec or less.
11. The spin current assisted magnetoresistance effect device according to claim 8 , wherein a time until stopping the application of the SOT inversion current and the STT inversion current after an application of the SOT inversion current is 10 nsec or less.
12. The spin current assisted magnetoresistance effect device according to claim 2 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
13. The spin current assisted magnetoresistance effect device according to claim 3 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
14. The spin current assisted magnetoresistance effect device according to claim 4 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
15. The spin current assisted magnetoresistance effect device according to claim 8 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
16. The spin current assisted magnetoresistance effect device according to claim 9 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
17. The spin current assisted magnetoresistance effect device according to claim 10 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.
18. The spin current assisted magnetoresistance effect device according to claim 11 , wherein a direction of magnetization of the second ferromagnetic metal layer and a direction of spin supplied from the spin-orbit torque wiring to the second ferromagnetic metal layer intersect each other.