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Magnetic monopole density and antiferromagnetic domain control in spin-ice iridates

Author

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  • M. J. Pearce

    (University of Warwick
    University of Oxford, Clarendon Laboratory)

  • K. Götze

    (University of Warwick
    Deutsches Elektronen-Synchrotron (DESY))

  • A. Szabó

    (University of Oxford, Clarendon Laboratory
    T.C.M. Group, Cavendish Laboratory, J. J. Thomson Avenue, University of Cambridge
    ISIS Facility, Rutherford Appleton Laboratory)

  • T. S. Sikkenk

    (T.C.M. Group, Cavendish Laboratory, J. J. Thomson Avenue, University of Cambridge
    Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University)

  • M. R. Lees

    (University of Warwick)

  • A. T. Boothroyd

    (University of Oxford, Clarendon Laboratory)

  • D. Prabhakaran

    (University of Oxford, Clarendon Laboratory)

  • C. Castelnovo

    (T.C.M. Group, Cavendish Laboratory, J. J. Thomson Avenue, University of Cambridge)

  • P. A. Goddard

    (University of Warwick)

Abstract

Magnetically frustrated systems provide fertile ground for complex behaviour, including unconventional ground states with emergent symmetries, topological properties, and exotic excitations. A canonical example is the emergence of magnetic-charge-carrying quasiparticles in spin-ice compounds. Despite extensive work, a reliable experimental indicator of the density of these magnetic monopoles is yet to be found. Using measurements on single crystals of Ho2Ir2O7 combined with dipolar Monte Carlo simulations, we show that the isothermal magnetoresistance is highly sensitive to the monopole density. Moreover, we uncover an unexpected and strong coupling between the monopoles on the holmium sublattice and the antiferromagnetically ordered iridium ions. These results pave the way towards a quantitative experimental measure of monopole density and demonstrate the ability to control antiferromagnetic domain walls using a uniform external magnetic field, a key goal in the design of next-generation spintronic devices.

Suggested Citation

  • M. J. Pearce & K. Götze & A. Szabó & T. S. Sikkenk & M. R. Lees & A. T. Boothroyd & D. Prabhakaran & C. Castelnovo & P. A. Goddard, 2022. "Magnetic monopole density and antiferromagnetic domain control in spin-ice iridates," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-27964-y
    DOI: 10.1038/s41467-022-27964-y
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    References listed on IDEAS

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    1. C. Castelnovo & R. Moessner & S. L. Sondhi, 2008. "Magnetic monopoles in spin ice," Nature, Nature, vol. 451(7174), pages 42-45, January.
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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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