Understanding thermal annealing of artificial spin ice

Xiaoyu Zhang, Yuyang Lao, Joseph Sklenar, Nicholas S. Bingham, Joseph T. Batley, Justin D. Watts, Cristiano Nisoli, Chris Leighton, Peter Schiffer

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We have performed a detailed study on thermal annealing of the moment configuration in artificial spin ice. Permalloy (Ni80Fe20) artificial spin ice samples were examined in the prototypical square ice geometry, studying annealing as a function of island thickness, island shape, and annealing temperature and duration. We also measured the Curie temperature as a function of film thickness, finding that thickness has a strong effect on the Curie temperature in regimes of relevance to many studies of the dynamics of artificial spin ice systems. Increasing the interaction energy between island moments and reducing the energy barrier to flipping the island moments allow the system to more closely approach the collective low energy state of the moments upon annealing, suggesting new channels for understanding the thermalization processes in these important model systems.

Original languageEnglish (US)
Article number111112
JournalAPL Materials
Volume7
Issue number11
DOIs
StatePublished - Nov 1 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • General Engineering

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