Disorder strength and field-driven ground state domain formation in artificial spin ice: experiment, simulation, and theory.
Phys Rev Lett
; 109(3): 037203, 2012 Jul 20.
Article
em En
| MEDLINE
| ID: mdl-22861890
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.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article