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1 August 2021 Avalanches, defects and ordering in artificial spin ice when the dipole approximation fails
Robert L. Stamps
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Proceedings Volume 11805, Spintronics XIV; 118051W (2021) https://doi.org/10.1117/12.2596258
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
Complex dynamics far from equilibrium in two dimensions can be explored in arrays of interacting nano-scale magnetic islands. We discuss how the fine details of how magnetic islands interact can lead to non-intuitive and often striking behaviour that is observable on macroscopic length and time scales. Results from nano-scale squid and Lorentz transmission electron microscopy imaging are analysed using models for thermal activation and Monte Carlo simulations. We find evidence for the emergence of effective anisotropies and surprising consequences for avalanche dynamics can be attributed to correlated, microscopic spin configurations that can arise within individual magnetic elements.
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Robert L. Stamps "Avalanches, defects and ordering in artificial spin ice when the dipole approximation fails", Proc. SPIE 11805, Spintronics XIV, 118051W (1 August 2021); https://doi.org/10.1117/12.2596258
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KEYWORDS
Magnetism
Anisotropy
Lithography
Physics
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