Measurement of the magnetic octupole susceptibility of PrV2Al20

Linda Ye (), Matthew E. Sorensen, Maja D. Bachmann and Ian R. Fisher ()
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Linda Ye: Stanford University
Matthew E. Sorensen: Stanford University
Maja D. Bachmann: Stanford University
Ian R. Fisher: Stanford University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Revealing the presence of magnetic octupole order and associated octupole fluctuations in solids is a highly challenging task due to the lack of simple external fields that can couple to magnetic octupoles. Here, we demonstrate a methodology for probing the magnetic octupole susceptibility of a candidate material, PrV2Al20, using a product of magnetic field Hi and shear strain ϵjk as a composite effective field, while employing an adiabatic elastocaloric effect to probe the response. We observe Curie-Weiss behavior in the obtained octupolar susceptibility down to approximately 3 K. Although octupole order does not appear to be the leading multipolar channel in PrV2Al20, our results nevertheless reveal the presence of strong magnetic octupole fluctuations and hence demonstrate that octupole order is at least a competing state. More broadly, our results highlight how anisotropic strain can be combined with magnetic fields to probe elusive ‘hidden’ electronic orders.

Date: 2024
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DOI: 10.1038/s41467-024-51269-x

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