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

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Pearce, Matthew J., Götze, K., Szabó, A., Sikkenk, T. S., Lees, Martin R., Boothroyd, A. T., Prabhakaran, D., Castelnovo, C. and Goddard, Paul (2022) Magnetic monopole density and antiferromagnetic domain control in spin-ice iridates. Nature Communications, 13 (1). 444 . doi:10.1038/s41467-022-27964-y ISSN 2041-1723.

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Official URL: http://dx.doi.org/10.1038/s41467-022-27964-y

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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.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Spin waves, Antiferromagnetism, Magnetic monopoles
Journal or Publication Title: Nature Communications
Publisher: Nature Publishing Group
ISSN: 2041-1723
Official Date: 21 January 2022
Dates:
DateEvent
21 January 2022Published
22 December 2021Accepted
Volume: 13
Number: 1
Article Number: 444
DOI: 10.1038/s41467-022-27964-y
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 21 January 2022
Date of first compliant Open Access: 21 January 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
681260Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
EP/N509796/1 [EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P034616/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/M007065/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/T028580/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/N034872/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/J017124/1 [EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
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