Common glass-forming spin-liquid state in the pyrochlore magnets Dy2Ti2O7 and Ho2Ti2O7

Azar B. Eyvazov, Ritika Dusad, Timothy J. S. Munsie, Hanna A. Dabkowska, Graeme M. Luke, Ethan R. Kassner, J. C. Seamus Davis, and Anna Eyal
Phys. Rev. B 98, 214430 – Published 18 December 2018
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Abstract

Despite a well-ordered pyrochlore crystal structure and strong magnetic interactions between the Dy3+ or Ho3+ ions, no long-range magnetic order has been detected in the pyrochlore titanates Ho2Ti2O7 and Dy2Ti2O7. To explore the actual magnetic phase formed by cooling these materials, we measure their magnetization dynamics using toroidal, boundary-free magnetization transport techniques. We find that the dynamical magnetic susceptibility of both compounds has the same distinctive phenomenology, which is indistinguishable in form from that of the dielectric permittivity of dipolar glass-forming liquids. Moreover, Ho2Ti2O7 and Dy2Ti2O7 both exhibit microscopic magnetic relaxation times that increase along the super-Arrhenius trajectories analogous to those observed in glass-forming dipolar liquids. Thus, upon cooling below about 2 K, Dy2Ti2O7 and Ho2Ti2O7 both appear to enter the same magnetic state exhibiting the characteristics of a glass-forming spin liquid.

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  • Received 3 January 2018
  • Revised 13 September 2018

DOI:https://doi.org/10.1103/PhysRevB.98.214430

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Azar B. Eyvazov1,*, Ritika Dusad1,*, Timothy J. S. Munsie2,3, Hanna A. Dabkowska2, Graeme M. Luke2,3,4, Ethan R. Kassner1,†, J. C. Seamus Davis1,5,6, and Anna Eyal1,‡

  • 1LASSP, Department of Physics, Cornell University, Ithaca, New York 14853, USA
  • 2Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, Canada L8S 4L8
  • 3Department of Physics, McMaster University, Hamilton, Ontario, Canada L8S 4M1
  • 4Canadian Institute for Advanced Research, Toronto, Ontario, Canada M5G 1Z8
  • 5CMPMS Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 6Tyndall National Institute, University College Cork, Cork T12 R5C, Ireland

  • *These authors contributed equally.
  • Current address: Honeywell International Inc., Golden Valley, MN 55422, USA.
  • anna.eyal@gmail.com

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Issue

Vol. 98, Iss. 21 — 1 December 2018

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