The magnetism of novel pyrochlores with a known muon site studied using muon-spin rotation

ORAL

Abstract

Pyrochlore oxides with the formula A2B2O7 display a rich variety of ground states and novel magnetic phenomena, encompassing cooperative paramagnetism, all-in all-out (AIAO) states and spin-ice behaviour. The magnetic ions on the A or B sites occupy sublattices of corner sharing tetrahedra. In muon experiments on pyrochlores, it is important to consider the extent to which an implated muon may perturb its local environment and whether it is capable of altering the intrinsic properties of the material under investigation, a significant effect for Pr-based pyrochlores [1]. We have determined the muon site in the pyrochlore structure and use this to understand experimental data obtained on Tm2Ti2O7 (singlet ground state), Y2V2O7 and Lu2V2O7 (candidate topological magnon insulator), and Lu2Ir2O7 (insulator, with AIAO structure). [1] F. R. Foronda, F. Lang, J. S. Möller, T. Lancaster, A. T. Boothroyd, F. L. Pratt, S. R. Giblin, D. Prabhakaran and S. J. Blundell, Phys. Rev. Lett. 114, 017602 (2015)

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Presenters

  • Steve Blundell

    University of Oxford, Department of Physics, University of Oxford, Physics, University of Oxford

Authors

  • Steve Blundell

    University of Oxford, Department of Physics, University of Oxford, Physics, University of Oxford

  • Franz Lang

    University of Oxford

  • Tom Lancaster

    Department of Physics, Durham University, Centre for Materials Physics, Durham University, Physics, Durham University

  • Dharmalingam Prabhakaran

    University of Oxford, Physics, University of Oxford, Department of Physics, University of Oxford, United Kingdom