High-temperature onset of field-induced transitions in the spin-ice compound Dy2Ti2O7

M. J. Matthews, C. Castelnovo, R. Moessner, S. A. Grigera, D. Prabhakaran, P. Schiffer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We have studied the field-dependent ac magnetic susceptibility of single crystals of Dy2Ti2O7 spin ice along the [111] direction in the temperature range 1.8-7 K. Our data reflect the onset of local spin-ice order in the appearance of different field regimes. In particular, we observe a prominent feature at approximately 1.0 T that is a precursor of the low-temperature metamagnetic transition out of field-induced kagome ice, below which the kinetic constraints imposed by the ice rules manifest themselves in a substantial frequency dependence of the susceptibility. Despite the relatively high temperatures, our results are consistent with a monopole picture, and they demonstrate that such a picture can give physical insight into spin-ice systems even outside the low-temperature, low-density limit where monopole excitations are well-defined quasiparticles.

Original languageEnglish
Article number214419
Number of pages6
JournalPhysical Review. B, Condensed matter and materials physics
Volume86
Issue number21
DOIs
Publication statusPublished - 19 Dec 2012

Keywords

  • DYNAMICAL MAGNETIC-PROPERTIES
  • MONOPOLES
  • HO2TI2O7
  • ENTROPY

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