Neutron diffraction studies of the magnetic phase diagram of the effective spin-1/2 triangular lattice antiferromagnet Na<sub>2</sub>BaCo(PO<sub>4</sub>)<sub>2</sub>

ORAL

Abstract

We report single crystal time-of-flight neutron diffraction measurements as function of applied magnetic field in the effective spin-1/2 stacked triangular lattice antiferromagnet Na2BaCo(PO4)2, recently proposed as a candidate to display unconventional magnetic behaviour with a rich phase diagram in applied c-axis field including a 1/3rd magnetization plateau phase [1,2]. We characterize the magnetic diffraction pattern in the various phases and discuss models of the magnetic structure evolution as a function of applied magnetic field up to saturation. [1] R.D. Zhong et al, Proc. Natl Acad. Sci. USA 116, 14505 (2019). [2] N. Li et al. Nat. Commun. 11, 1-9 (2020).

*We acknowledge support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme Grant Agreement Number 788814 (EQFT). The work at the University of Tennessee was supported by the National Science Foundation through award DMR-2003117.

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Presenters

  • Radu Coldea

    • University of Oxford Physics Department

Authors

  • Ryutaro Okuma

    • University of Oxford
    • University of Oxford Physics Department

  • Pascal Manuel

    • ISIS Pulsed Neutron Source UK
    • ISIS Neutron and Muon Source
    • ISIS neutron source

  • Qing Huang

    • University of Tennessee

  • Haidong Zhou

    • University of Tennessee

  • Radu Coldea

    • University of Oxford Physics Department