Picosecond transfer from short-term to long-term memory in analog antiferromagnetic memory device
Abstract
Previous experiments in compensated magnets have demonstrated a potential for approaching the limit of fastest and least-dissipative operation of digital memory bits. However, the analog route has been virtually unexplored at (sub)ps time scales. In this paper, we report on experimental separation of heat-related and quench-switching-related resistance signal dynamics induced at room temperature by a single femtosecond-laser-pulse in memory devices made from a metallic antiferromagnetic CuMnAs. We show that the heat-related dynamics, on picosecond to hundreds of nanoseconds time scales, can be used as a short-term memory where information about input stimuli, represented by laser-pulses, is stored temporarily. When the quench-switching threshold is reached, information is transferred to the device's variable resistance, serving as a long-term memory, with time components of 10 ms and 10 s. The potentially appealing features of the heat-based memory for several distinct research fields, including bio-inspired analogue devices and heat-based logic, are also discussed.
Keywords
Cite
@article{arxiv.2401.17370,
title = {Picosecond transfer from short-term to long-term memory in analog antiferromagnetic memory device},
author = {M. Surynek and J. Zubac and K. Olejnik and A. Farkas and F. Krizek and L. Nadvornik and P. Kubascik and F. Trojanek and R. P. Campion and V. Novak and T. Jungwirth and P. Nemec},
journal= {arXiv preprint arXiv:2401.17370},
year = {2025}
}
Comments
v2: AAM; licence: CC BY 4.0. Supplementary material is a part of this submission. Data necessary for replication of results are available in the Zenodo repository at 10.5281/zenodo.14856616