Ground state lost but degeneracy found: The effective thermodynamics of artificial spin ice

Cristiano Nisoli, Ruifang Wang, Jie Li, William F. McConville, Paul E. Lammert, Peter Schiffer, Vincent H. Crespi

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

We analyze the rotational demagnetization of artificial spin ice, a recently realized array of nanoscale single-domain ferromagnetic islands. Demagnetization does not anneal this model system into its antiferromagnetic ground state: the moments have a static disordered configuration similar to the frozen state of the spin ice materials. We demonstrate that this athermal system has an effective extensive degeneracy and we introduce a formalism that can predict the populations of local states in this icelike system with no adjustable parameters.

Original languageEnglish (US)
Article number217203
JournalPhysical Review Letters
Volume98
Issue number21
DOIs
StatePublished - May 23 2007

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demagnetization
ice
thermodynamics
ground state
formalism
moments
configurations

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Nisoli, Cristiano ; Wang, Ruifang ; Li, Jie ; McConville, William F. ; Lammert, Paul E. ; Schiffer, Peter ; Crespi, Vincent H. / Ground state lost but degeneracy found : The effective thermodynamics of artificial spin ice. In: Physical Review Letters. 2007 ; Vol. 98, No. 21.
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Ground state lost but degeneracy found : The effective thermodynamics of artificial spin ice. / Nisoli, Cristiano; Wang, Ruifang; Li, Jie; McConville, William F.; Lammert, Paul E.; Schiffer, Peter; Crespi, Vincent H.

In: Physical Review Letters, Vol. 98, No. 21, 217203, 23.05.2007.

Research output: Contribution to journalArticle

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