Thermal noise effects on the magnetization switching of a ferromagnetic anomalous Josephson junction

TL;DR

This paper explores how thermal noise influences magnetization switching in a ferromagnetic Josephson junction with spin-orbit coupling, identifying optimal parameters for fast and robust operation at higher temperatures.

Contribution

It introduces an analysis of thermal noise effects on magnetization reversal and proposes conditions for noise-resilient, fast switching in ferromagnetic Josephson junctions.

Findings

Thermal fluctuations affect the stability of magnetization states.

Optimal parameters for fast switching are identified.

Conditions for increased robustness against thermal noise are proposed.

Abstract

We discuss the effects of thermal noise on the magnetic response of a lateral ferromagnetic Josephson junction with spin-orbit coupling and out-of-plane magnetization. The direction of the magnetic moment in the ferromagnetic layer can be inverted by using controlled current pulses. This phenomenon is due to the magnetoelectric effect that couples the flowing charge current and the magnetization of the ferromagnet. We investigate the magnetization reversal effect versus intrinsic parameters of the ferromagnet, such as the Gilbert damping and strength of the spin-orbit coupling. We estimate the magnetization reversing time and find the optimal values of the parameters for fast switching. With the aim of increasing the operation temperature we study the effects induced by thermal fluctuations on the averaged stationary magnetization, and find the conditions that make the system more robust against noise.