Spin-Flip Scattering Effect on the Current-Induced Spin Torque in Ferromagnet-Insulator-Ferromagnet Tunnel Junctions

Abstract

We have investigated the current-induced spin transfer torque of a ferromagnet-insulator-ferromagnet tunnel junction by taking the spin-flip scatterings into account. It is found that the spin-flip scattering can induce an additional spin torque, enhancing the maximum of the spin torque and giving rise to an angular shift compared to the case when the spin-flip scatterings are neglected. The effects of the molecular fields of the left and right ferromagnets on the spin torque are also studied. It is found that ${\tau }^{Rx}/I_e$ (${\tau }^{Rx}$ is the spin-transfer torque acting on the right ferromagnet and $I_e$ is the tunneling elcetrical current) does vary with the molecular fields. At two certain angles, ${\tau }^{Rx}/I_e$ is independent of the molecular field of the right ferromagnet, resulting in two crossing points in the curve of ${\tau }^{Rx}/I_e$ versus the relevant orientation for different molecular fields.

Revtex, 11 papes, 4 figures, appendix

References in corpus (7)

• Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
• The Role of Spin-Dependent Interface Scattering in Generating Current-Induced Torques in Magnetic Multilayers
• Spin-transport in multi-terminal normal metal - ferromagnet systems with non-collinear magnetizations
• Magnetic exchange interaction induced by a Josephson current
• Current and Spin-Torque in Double Tunnel Barrier Ferromagnet - Superconductor - Ferromagnet Systems
• Effect of Spin-Flip Scattering on Electrical Transport in Magnetic Tunnel Junctions
• Current induced switching of magnetic domains to a perpendicular configuration

Cited by in corpus (6)

• Spin Current and Current-Induced Spin Transfer Torque in Ferromagnet-Quantum Dot-Ferromagnet Coupled Systems
• Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics
• Time-Dependent Spin-Polarized Transport Through a Resonant Tunneling Structure with Multi-Terminal
• Logical XOR gate response in a quantum interferometer: A spin dependent transport
• Time-Dependent Spintronic Transport and Current-Induced Spin Transfer Torque in Magnetic Tunnel Junctions
• Spin transfer in a ferromagnet-quantum dot and tunnel barrier coupled Aharonov-Bohm ring system with Rashba spin-orbit interactions