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Experimental realization of the 1D random field Ising model

Citation

Bingham, Nicholas et al. (2022), Experimental realization of the 1D random field Ising model, Dryad, Dataset, https://doi.org/10.5061/dryad.vx0k6djtb

Abstract

We have measured magnetic-field-induced avalanches in a square artificial spin ice array of interacting nanomagnets. Starting from the ground state ordered configuration, we imaged the individual nanomagnet moments after each successive application of an incrementally increasing field. The statistics of the evolution of the moment configuration show good agreement with the canonical one-dimensional random field Ising model. We extract information about the microscopic structure of the arrays from our macroscopic measurements of their collective behavior, demonstrating a process that could be applied to other systems exhibiting avalanches.

Methods

All image collected with magnetic force microscopy

Funding

U.S. Department of Energy, Award: DE-SC0010778

U.S. Department of Energy, Award: DE-SC0020162

National Science Foundation, Award: DMR-1807124

National Science Foundation, Award: DMR-2103711