Multi-Step Ordering in Kagome and Square Artificial Spin Ice

Details Multi-Step Ordering in Kagome and Square Artificial Spin Ice Multi-Step Ordering in Kagome and Square Artificial Spin Ice

2011-11-30

arxiv.org/abs/1112.0021v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 11 postscript figures

Scientific paper

We show that in colloidal models of artificial kagome and modified square ice systems, a variety of ordering and disordering regimes occur as a function of biasing field, temperature, and colloid-colloid interaction strength, including ordered monopole crystals, biased ice rule states, thermally induced ice rule ground states, biased triple states, and disordered states. We describe the lattice geometries and biasing field protocols that create the different states and explain the formation of the states in terms of sublattice switching thresholds. For a system prepared in a monopole lattice state, we show that a sequence of different orderings occurs for increasing temperature. Our results also explain several features observed in nanomagnetic artificial ice systems under an applied field.

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