Spin-ice physics in cadmium cyanide

Chloe S. Coates, Mia Baise, Adrian Schmutzler, Arkadiy Simonov, Joshua W. Makepeace, Andrew G. Seel, Ronald I. Smith, Helen Y. Playford, David A. Keen, Renée Siegel, Jürgen Senker, Ben Slater () and Andrew L. Goodwin ()
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Chloe S. Coates: University of Oxford, Inorganic Chemistry Laboratory
Mia Baise: University College London
Adrian Schmutzler: University of Bayreuth
Arkadiy Simonov: University of Oxford, Inorganic Chemistry Laboratory
Joshua W. Makepeace: University of Oxford, Inorganic Chemistry Laboratory
Andrew G. Seel: University of Oxford, Inorganic Chemistry Laboratory
Ronald I. Smith: Harwell Campus
Helen Y. Playford: Harwell Campus
David A. Keen: Harwell Campus
Renée Siegel: University of Bayreuth
Jürgen Senker: University of Bayreuth
Ben Slater: University College London
Andrew L. Goodwin: University of Oxford, Inorganic Chemistry Laboratory

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Spin-ices are frustrated magnets that support a particularly rich variety of emergent physics. Typically, it is the interplay of magnetic dipole interactions, spin anisotropy, and geometric frustration on the pyrochlore lattice that drives spin-ice formation. The relevant physics occurs at temperatures commensurate with the magnetic interaction strength, which for most systems is 1–5 K. Here, we show that non-magnetic cadmium cyanide, Cd(CN)2, exhibits analogous behaviour to magnetic spin-ices, but does so on a temperature scale that is nearly two orders of magnitude greater. The electric dipole moments of cyanide ions in Cd(CN)2 assume the role of magnetic pseudospins, with the difference in energy scale reflecting the increased strength of electric vs magnetic dipolar interactions. As a result, spin-ice physics influences the structural behaviour of Cd(CN)2 even at room temperature.

Date: 2021
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DOI: 10.1038/s41467-021-22515-3

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