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1 August 2021 Tuning magnetic order in artificial spin ices: thermalisation, disorder and non-equilibrium phenomena
Gavin M. Macauley, Gary Paterson, Rair Macedo, Stephen McVitie, Robert Stamps
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Proceedings Volume 11805, Spintronics XIV; 118051Z (2021) https://doi.org/10.1117/12.2594649
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
Artificial spin ices are arrays of correlated nano-scale magnetic islands that prove an excellent playground in which to study critical phenomena. In this contribution, we discuss how both geometry and the coupling of islands to external fields influence magnetic order. Using Lorentz transmission electron microscopy, we study a transition between antiferromagnetic and ferromagnetic order across a continuum of spin ice geometries. We show how emergent anisotropies can arise in field-driven processes and how relaxation timescales can be adjusted locally within arrays through a coupling to a site-specific bias field. Our work demonstrates artificial spin ice as an excellent testbed in which to probe non-equilibrium phenomena in low-dimensional systems.
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Gavin M. Macauley, Gary Paterson, Rair Macedo, Stephen McVitie, and Robert Stamps "Tuning magnetic order in artificial spin ices: thermalisation, disorder and non-equilibrium phenomena", Proc. SPIE 11805, Spintronics XIV, 118051Z (1 August 2021); https://doi.org/10.1117/12.2594649
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KEYWORDS
Magnetism
Anisotropy
Cobalt
Control systems
Ferromagnetics
Transmission electron microscopy
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