Disorder strength and field-driven ground state domain formation in artificial spin ice: Experiment, simulation, and theory

Budrikis, Zoe, Morgan, J P, Akerman, J, Stein, A, Politi, Paolo, Langridge, S, Marrows, C H and Stamps, R L 2012. Disorder strength and field-driven ground state domain formation in artificial spin ice: Experiment, simulation, and theory. Physical Review Letters 109 (3) , 037203. 10.1103/PhysRevLett.109.037203

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Abstract

Quenched disorder affects how nonequilibrium systems respond to driving. In the context of artificial spin ice, an athermal system comprised of geometrically frustrated classical Ising spins with a twofold degenerate ground state, we give experimental and numerical evidence of how such disorder washes out edge effects and provide an estimate of disorder strength in the experimental system. We prove analytically that a sequence of applied fields with fixed amplitude is unable to drive the system to its ground state from a saturated state. These results should be relevant for other systems where disorder does not change the nature of the ground state.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Physical Society
ISSN:	0031-9007
Last Modified:	26 May 2023 15:15
URI:	https://orca.cardiff.ac.uk/id/eprint/157992

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