Reducing Disorder in Artificial Kagome Ice

Details Reducing Disorder in Artificial Kagome Ice Reducing Disorder in Artificial Kagome Ice

2011-08-30

arxiv.org/abs/1108.6071v1

Phys. Rev. Lett. 107, 167201 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.107.167201

Artificial spin ice has become a valuable tool for understanding magnetic interactions on a microscopic level. The strength in the approach lies in the ability of a synthetic array of nanoscale magnets to mimic crystalline materials, composed of atomic magnetic moments. Unfortunately, these nanoscale magnets, patterned from metal alloys, can show substantial variation in relevant quantities such as coercive field, with deviations up to 6%. By carefully studying the reversal process of artificial kagome ice, we can directly measure the distribution of coercivities, and by switching from disconnected islands to a connected structure, we find that the coercivity distribution can achieve a deviation of only 3.3%. These narrow deviations should allow the observation of behavior that mimics canonical spin-ice materials more closely.

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