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Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu4(PO4)4 with Cu4O12 square cupolas

Author

Listed:
  • K. Kimura

    (Graduate School of Engineering Science, Osaka University)

  • P. Babkevich

    (Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL))

  • M. Sera

    (Graduate School of Engineering Science, Osaka University)

  • M. Toyoda

    (Tokyo Institute of Technology)

  • K. Yamauchi

    (ISIR-SANKEN, Osaka University)

  • G. S. Tucker

    (Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL)
    Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut)

  • J. Martius

    (Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL))

  • T. Fennell

    (Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut)

  • P. Manuel

    (ISIS facility, STFC Rutherford Appleton Laboratory, Chilton)

  • D. D. Khalyavin

    (ISIS facility, STFC Rutherford Appleton Laboratory, Chilton)

  • R. D. Johnson

    (ISIS facility, STFC Rutherford Appleton Laboratory, Chilton)

  • T. Nakano

    (Graduate School of Science, Osaka University)

  • Y. Nozue

    (Graduate School of Science, Osaka University)

  • H. M. Rønnow

    (Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL))

  • T. Kimura

    (Graduate School of Engineering Science, Osaka University)

Abstract

In vortex-like spin arrangements, multiple spins can combine into emergent multipole moments. Such multipole moments have broken space-inversion and time-reversal symmetries, and can therefore exhibit linear magnetoelectric (ME) activity. Three types of such multipole moments are known: toroidal; monopole; and quadrupole moments. So far, however, the ME activity of these multipole moments has only been established experimentally for the toroidal moment. Here we propose a magnetic square cupola cluster, in which four corner-sharing square-coordinated metal-ligand fragments form a noncoplanar buckled structure, as a promising structural unit that carries an ME-active multipole moment. We substantiate this idea by observing clear magnetodielectric signals associated with an antiferroic ME-active magnetic quadrupole order in the real material Ba(TiO)Cu4(PO4)4. The present result serves as a useful guide for exploring and designing new ME-active materials based on vortex-like spin arrangements.

Suggested Citation

  • K. Kimura & P. Babkevich & M. Sera & M. Toyoda & K. Yamauchi & G. S. Tucker & J. Martius & T. Fennell & P. Manuel & D. D. Khalyavin & R. D. Johnson & T. Nakano & Y. Nozue & H. M. Rønnow & T. Kimura, 2016. "Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu4(PO4)4 with Cu4O12 square cupolas," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13039
    DOI: 10.1038/ncomms13039
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