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ECE Professor Mayergoyz Publishes in Physical Review B on Stochastic Resonance

ECE Professor Mayergoyz Publishes in Physical Review B on Stochastic Resonance

A paper co-authored by ECE Alford L. Ward Professor Issak Mayergoyz, Professor D’Aquino, and former post-doctoral researcher of Dr. Mayergoyz, Professor Serpico, has been published in the American Physical Society journal, Physical Review B. The paper, titled, “Stochastic resonance in noise-induced transitions between self-oscillations and equilibria in spin-valve nanomagnets”, was co-authored by R. Bonin and G. Bertotti.

This paper studied the thermally induced synchronization between magnetization transitions and “weak” ac excitations for spin-transfer oscillators. The authors developed a theoretical approach, based on the separation of time scales to investigate this physical phenomenon. By applying the appropriate averaging technique to the Fokker-Planck equation associated with the stochastic magnetization dynamics, a stochastic differential equation for the “slow” (energy) variable was derived. This equation analyzes intrawell thermal transitions between magnetization equilibria and self-oscillations.  The outcome demonstrated that the thermally induced synchronization between magnetization transitions and ac excitation can be viewed as a stochastic resonance effect. It is shown that this effect occurs in spin-transfer nano-oscillators both in the classical case of subthreshold ac excitation as well as in the suprathreshold case. The theoretical predictions are in sound agreement with simulations of the Landau-Lifshitz-Slonczewski dynamics.

Physical Review B is the largest and most comprehensive international journal specializing in condensed matter and materials physics, publishing important papers on a wide range of topics. The journal has an impact factor of 3.772 (2010) and is ranked number one in total citations in condensed matter physics.

Related Articles:
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"Plasmon Resonances in Nanoparticles" is Among World Scientific's Most Downloaded
Mayergoyz Invited to Speak at Workshop in Italy
Khaligh and Mayergoyz receive MIPS grant for EV battery charger

November 29, 2011


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