Critical current density of a spin-torque oscillator with an in-plane magnetized free layer and an out-of-plane magnetized polarizer

Abstract

Spin-torque induced magnetization dynamics in a spin-torque oscillator with an in-plane (IP) magnetized free layer and an out-of-plane (OP) magnetized polarizer under IP shape-anisotropy field ($H_{\mathrm{k}}$) and applied IP magnetic field ($H_{\mathrm{a}}$) was theoretically studied based on the macrospin model. The rigorous analytical expression of the critical current density ($J_{c1}$) for the OP precession was obtained. The obtained expression successfully reproduces the experimentally obtained $H_{\mathrm{a}}$-dependence of $J_{c1}$ reported in [D. Houssameddine $et$ $al$., Nat. Mater. 6, 447 (2007)].

arXiv comment10 pages, 3 figures

References in corpus (3)

• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
• Spin Transfer Dynamics in Spin Valves with Out-of-plane Magnetized CoNi Free Layers

Cited by in corpus (3)

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• Substantial reduction of write-error rate for voltage-controlled magnetoresistive random access memory by in-plane demagnetizing field and voltage-induced negative out-of-plane anisotropy field