Resonance spin transfer torque in ferromagnetic/normal/ferromagnetic spin-valve structure of topological insulators
arXiv:1808.08379 · doi:10.1016/j.jmmm.2019.165605
Abstract
We theoretically study the spin current and spin-transfer torque generation in a conventional spin- valve hybrid structure of type ferromagnetic/normal metal/ferromagnetic (FM/NM/FM) made of the topological insulator (TI), in which a gate voltage is attached to the normal layer. We demonstrate the penetration of the spin-transfer torque into the right ferromagnetic layer and show that, unlike graphene spin-valve junction, the spin-transfer torque in TI is very sensitive to the chemical potential of the NM region. As an important result, by changing the chemical potential of the NM spacer and magnetization directions, one can control all components of the STT. Interestingly, both the resonance spin current and the resonance spin-transfer torque appear for energies determined from a resonance equation. By increasing the chemical potential of the NM spacer, the amplitude of the STTs decreases while at large chemical potentials of there are intervals of chemical potential in which both the spin current and the spin-transfer torque become zero. These findings could open new perspectives for applications in spin-transfer torque magnetic random access memory (STT-MRAM) devices based on TI.
arXiv comment8 pages, 7 figures
References in corpus (25)
- Spintronics: Fundamentals and applications
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
- Magnetic switching by spin torque from the spin Hall effect
- Spin Transfer Torques
- Spin Caloritronics
- Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
- Superconducting Spintronics
- Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions
- Observation of spin-transfer switching in deep submicron-sized and low-resistance magnetic tunnel junctions
- Microscopic approach to current-driven domain wall dynamics
- Anomalous Bias Dependence of Spin Torque in Magnetic Tunnel Junctions
- Spin Transfer Switching and Spin Polarization in Magnetic Tunnel Junctions with Mgo and Alox Barriers
- Tolerance of topological surface states towards magnetic moments: Fe on Bi2Te3 and Bi2Se3
- Quantum spin field effect transistor
- Spin-transfer torque in magnetic tunnel junctions: Scattering theory
- Dirac Spin-Orbit Torques at the Surface of Topological Insulators
- Topological phase and edge states dependence of the RKKY interaction in zigzag silicene nanoribbon
- Anomalous magnetic transport in ferromagnetic graphene junctions
- Strongly anisotropic RKKY interaction in monolayer black phosphorus
- Giant magnetoresistance and anomalous transport in phosphorene-based multilayers with noncollinear magnetization
- Anisotropic RKKY interaction in spin polarized graphene
- Exchange interaction of magnetic impurities in biased bilayer phosphorene nanoribbon
- Dielectric function of the semiconductor hole gas
- Dielectric function of the semiconductor hole liquid: Full frequency and wave vector dependence
- Spin field-effect transistor in a quantum spin-Hall device