A network model for field and quenched disorder effects in artificial spin ice

Details A network model for field and quenched disorder effects in artificial spin ice A network model for field and quenched disorder effects in artificial spin ice

2011-12-09

arxiv.org/abs/1112.2069v2

Zoe Budrikis et al 2012 New J. Phys. 14 045008

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1088/1367-2630/14/4/045008

We have performed a systematic study of the effects of field strength and quenched disorder on the driven dynamics of square artificial spin ice. We construct a network representation of the configurational phase space, where nodes represent the microscopic configurations and a directed link between node i and node j means that the field may induce a transition between the corresponding configurations. In this way, we are able to quantitatively describe how the field and the disorder affect the connectedness of states and the reversibility of dynamics. In particular, we have shown that for optimal field strengths, a substantial fraction of all states can be accessed using external driving fields, and this fraction is increased by disorder. We discuss how this relates to control and potential information storage applications for artificial spin ices.

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