Coexisting zero-field and field induced relaxation channels in spinel spin ice

ORAL

Abstract

Spin ice materials exhibit novel magnetic behaviour because of their atomic interactions and geometric constraints of the crystal lattice. This novel behaviour takes the form of emergent quasi-particles that behave as magnetic monopoles. We have studied the spin ice materials CdEr2Se4 and CdEr2S4 using a bespoke high frequency ac susceptometer capable of measuring at low temperatures (>2K). These ac susceptibility measurements have uncovered novel behaviour when in the presence of applied DC fields, in the form of two coexisting relaxation channels with differing time scales and temperature dependence. Such behaviour has not been so directly observed before. We have further investigated the relaxations by use of DC magnetisation and muon spin rotation techniques.

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Presenters

  • Edward Riordan

    • Cardiff University

Authors

  • Edward Riordan

    • Cardiff University

  • Tom Fennell

    • paul scherrer insitute
    • Paul Scherrer Institute
    • Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, Villigen
    • Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute

  • Elsa Lhotel

    • Institut Néel, CNRS
    • Neel Institute

  • Oksana Zaharko

    • paul scherrer insitute
    • Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, Villigen

  • Vladimir Tsurkan

    • university of ausburg
    • University of Augsburg
    • Experimental Physics-V, Academy of Sciences of Moldova, University of Augsburg Germany, Institute of Applied Physics

  • Sean Giblin

    • School of Physics and Astronomy, Cardiff University
    • Cardiff University
    • School of Physics and Astronomy, Cardiff University, United Kingdom
    • University of Cardiff