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Restoration of the third law in spin ice thin films

Author

Listed:
  • L. Bovo

    (University College London, 17-19 Gordon Street)

  • X. Moya

    (University of Cambridge)

  • D. Prabhakaran

    (University of Oxford, Clarendon Laboratory, Parks Road)

  • Yeong-Ah Soh

    (University College London, 17-19 Gordon Street
    Imperial College London, Prince Consort Rd)

  • A.T. Boothroyd

    (University of Oxford, Clarendon Laboratory, Parks Road)

  • N.D. Mathur

    (University of Cambridge)

  • G. Aeppli

    (University College London, 17-19 Gordon Street)

  • S.T. Bramwell

    (University College London, 17-19 Gordon Street)

Abstract

A characteristic feature of spin ice is its apparent violation of the third law of thermodynamics. This leads to a number of interesting properties including the emergence of an effective vacuum for magnetic monopoles and their currents – magnetricity. Here we add a new dimension to the experimental study of spin ice by fabricating thin epitaxial films of Dy2Ti2O7, varying between 5 and 60 monolayers on an inert substrate. The films show the distinctive characteristics of spin ice at temperatures >2 K, but at lower temperature we find evidence of a zero entropy state. This restoration of the third law in spin ice thin films is consistent with a predicted strain-induced ordering of a very unusual type, previously discussed for analogous electrical systems. Our results show how the physics of frustrated pyrochlore magnets such as spin ice may be significantly modified in thin-film samples.

Suggested Citation

  • L. Bovo & X. Moya & D. Prabhakaran & Yeong-Ah Soh & A.T. Boothroyd & N.D. Mathur & G. Aeppli & S.T. Bramwell, 2014. "Restoration of the third law in spin ice thin films," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4439
    DOI: 10.1038/ncomms4439
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    Cited by:

    1. Han Zhang & Chengkun Xing & Kyle Noordhoek & Zhaoyu Liu & Tianhao Zhao & Lukas Horák & Qing Huang & Lin Hao & Junyi Yang & Shashi Pandey & Elbio Dagotto & Zhigang Jiang & Jiun-Haw Chu & Yan Xin & Eun , 2023. "Anomalous magnetoresistance by breaking ice rule in Bi2Ir2O7/Dy2Ti2O7 heterostructure," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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