Abstract—Several experiments report the presence of finite jumps in the properties of spin-torque-oscillators at room temperature, such as oscillation frequency and power as functions of current or field. On the basis of micromagnetic simulations, this paper links those experimental discontinuities to the changes in the curve slope numerically observed in absence of thermal effects. Our numerical results show the key ingredient triggering this behavior is the presence of abrupt changes in the oscillation axis of the magnetization precession. We also predict that by fixing the bias point of the oscillator near those critical regions it is possible to observe hysteretic synchronization.
Hysteretic Synchronization in SpinTorque NanoContact Oscillators: a Micromagnetic Study
PULIAFITO, VITO;AZZERBONI, Bruno;FINOCCHIO, Giovanni
2014-01-01
Abstract
Abstract—Several experiments report the presence of finite jumps in the properties of spin-torque-oscillators at room temperature, such as oscillation frequency and power as functions of current or field. On the basis of micromagnetic simulations, this paper links those experimental discontinuities to the changes in the curve slope numerically observed in absence of thermal effects. Our numerical results show the key ingredient triggering this behavior is the presence of abrupt changes in the oscillation axis of the magnetization precession. We also predict that by fixing the bias point of the oscillator near those critical regions it is possible to observe hysteretic synchronization.Pubblicazioni consigliate
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