Editors' Suggestion - Physical Review Applied journal article

Prof. Dan Lathrop and Dr. Advait Madhavan from IREAP have co-written an article titled "Measurement-driven Langevin modeling of superparamagnetic tunnel junctions", published in Physical Review Applied this month. This work is the result of a collaboration with NIST, and it was highlighted by the journal as an "Editors' suggestion". It is available in this link: https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.22.014057

Abstract: Superparamagnetic tunnel junctions are important devices for a range of emerging technologies, but most existing compact models capture only their mean switching rates. Capturing qualitatively accurate analog dynamics of these devices will be important as the technology scales up. Here we present results using a one-dimensional overdamped Langevin equation that captures statistical properties of measured time traces, including voltage histograms, drift and diffusion characteristics as measured with Kramers-Moyal coefficients, and dwell-time distributions. While common macrospin models are more physically motivated magnetic models than the Langevin model, we show that for the device measured here, they capture even fewer of the measured experimental behaviors.

Published August 19, 2024