Field-free synthetic-ferromagnet spin torque oscillator
نویسندگان
چکیده
منابع مشابه
Concept of a Bias-Field-Free Spin-Torque Oscillator Based on Two MgO-MTJs
We propose a novel spin-torque oscillator based on two MgO-MTJs with a shared free layer. By performing extensive micromagnetic modeling we found that the structure exhibits a wide tunability of oscillation frequencies from a few GHz to several ten GHz.
متن کاملSpin-Flip Scattering Effect on the Current-Induced Spin Torque in Ferromagnet-Insulator-Ferromagnet Tunnel Junctions
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 ef...
متن کاملMicromagnetic Modeling of a Bias-Field-Free Spin-Torque Oscillator Based on Two MgO-MTJs with a Shared Free Layer
Spin-torque oscillators based on a single MTJ with in-plane magnetization exhibit high frequency capabilities, but still need an external biasing magnetic field and are characterized by low output power level [1]. Oscillators on MTJs with perpendicular magnetization and vortex-based oscillators are shown to generate oscillations without an external magnetic field, however, their low operating f...
متن کاملBias-Field-Free Spin-Torque Oscillator Based on Two MgO-MTJs with a Shared Free Layer: Micromagnetic Modeling
New types of spintronics devices utilizing all-electrical magnetization manipulation by current, such as spin-torque transfer RAM and spin-torque oscillators, have been developed based on MgO magnetic tunnel junctions (MTJs) [1]. Spin-torque oscillators based on MTJs with in-plane magnetization [2] show high frequency capabilities, but still need an external magnetic field and are characterized...
متن کاملNanowire spin torque oscillator driven by spin orbit torques.
Spin torque from spin current applied to a nanoscale region of a ferromagnet can act as negative magnetic damping and thereby excite self-oscillations of its magnetization. In contrast, spin torque uniformly applied to the magnetization of an extended ferromagnetic film does not generate self-oscillatory magnetic dynamics but leads to reduction of the saturation magnetization. Here we report st...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2013
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.87.020409