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

Research output: Contribution to journalArticlepeer-review

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 (US)
Article number214419
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number21
DOIs
StatePublished - Dec 19 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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