Thermal Dynamics in Symmetric Magnetic Nanopillars Driven by Spin Transfer

TL;DR

This paper investigates how spin transfer influences thermal switching behavior in symmetric magnetic nanopillars, revealing complex dependencies and coupling effects between layers caused by current-induced excitations.

Contribution

It provides new insights into the coupled thermal and spin transfer dynamics in symmetric magnetic nanopillars, highlighting anomalous switching behaviors and interlayer interactions.

Findings

Symmetric nanopillars show anomalous switching statistics dependent on magnetic field and current.

Evidence of coupling between layer fluctuations due to spin transfer effects.

Simultaneous excitation of both layers by current influences thermal dynamics.

Abstract

We study the effects of spin transfer on thermally activated dynamics of magnetic nanopillars with identical thicknesses of the magnetic layers. The symmetric nanopillars exhibit anomalous dependencies of switching statistics on magnetic field and current. We interpret our data in terms of simultaneous current-induced excitation of both layers. We also find evidence for coupling between the fluctuations of the layers due to the spin transfer.