Magnetic stochastic oscillators: Noise-induced synchronization to under-threshold excitation and comprehensive compact model
Magnetics, IEEE Transactions(2015)
摘要
Superparamagnetic tunnel junctions are noise powered stochastic oscillators, which can harness thermal energy through phenomena such as stochastic resonance and noise-induced synchronization. This enables them to operate with minimal externally supplied energy and therefore makes them promising candidates for implementing bioinspired computing schemes. These applications require understanding how superparamagnetic tunnel junctions can be integrated into CMOS circuits. In this work, we present a compact model of superparamagnetic tunnel junction, written in the VerilogA language, that can be used within standard integrated circuit design tools. This compact model is based on the N´eel-Brown model and allows for fast simulations. We show that this model can reproduce the experimental characterization of a sample subjected to different values of DC currents. Then we definitively demonstrate the validity of the model by confronting it to experimental results in the case of a complex phenomenon: noise-induced synchronization.
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关键词
spintronics,bioinspired computing,magnetic tunnel junctions,stochastic resonance,synchronization,semiconductor device modeling,oscillators,computational modeling
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