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Short-Range Correlations in the Magnetic Ground State of Na4Ir3O8

Published

Author(s)

Rebecca Dally, Tom Hogan, Alex Amato, Chris Baines, Jose Rodriguez Rivera, Michael J. Graf, Stephen D. Wilson

Abstract

The magnetic ground state of the Jeff = 1/2 hyper-Kagome lattice in Na4Ir3O8 is explored via combined bulk magnetization, muon spin relaxation, and neutron scattering measurements. A short-range, frozen, state comprised of quasi-static moments develops below a characteristic temperature of ΤF=6 K, revealing an inhomogeneous distribution of spins occupying the entirety of the sample volume. Quasi-static, short-range, spin correlations persist until at least 20 mK and differ substantially from the nominally dynamic response of a quantum spin liquid, instead freezing into fragmented order with a response resembling that of frustrated spin-ice. Our data demonstrate that an inhomogeneous magnetic ground state arises in Na4Ir3O8 driven either by disorder inherent to the creation of the hyper-Kagome lattice itself or stabilized via quantum fluctuations.
Citation
Physical Review Letters
Volume
113
Issue
24

Keywords

Neutron Scattering, Magnetic Materials

Citation

Dally, R. , Hogan, T. , Amato, A. , Baines, C. , Rodriguez Rivera, J. , Graf, M. and Wilson, S. (2014), Short-Range Correlations in the Magnetic Ground State of Na<sub>4</sub>Ir<sub>3</sub>O<sub>8</sub>, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917213 (Accessed June 16, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created December 11, 2014, Updated October 12, 2021