Magnetic anisotropy of the spin-ice compound Dy2Ti2O7

By H. Fukazawa, Roger G. Melko, R. Higashinaka, Y. Maeno, Michel J. P. Gingras. 2001

138 citations recorded by the source corpus.

We report magnetization and ac susceptibility of single crystals of the spin-ice compound ${\mathrm{Dy}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}.$ Saturated moments at 1.8 K along the characteristic axes [100] and [110] agree with the expected values for an effective ferromagnetic nearest-neighbor Ising pyrochlore with local $〈111〉$ anisotropy, where each magnetic moment is constrained to obey the ``ice rule.'' At high enough magnetic fields along the [111] axis, the saturated moment exhibits a breaking of the ice rule; it agrees with the value expected for a three-in, one-out spin configuration. Assuming the realistic magnetic interaction between Dy ions given by the dipolar spin ice model, we completely reproduce the results at 2 K by Monte Carlo calculations. However, down to at least 60 mK, we have not found any experimental evidence of the long-range magnetic ordering predicted by this model to occur at around 180 mK. Instead, we confirm the spin freezing of the system below 0.5 K.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/b3e1ab239c5b1e9947ae36c8831e02b416b80764

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Condensed Matter Physics

  1. Michel J. P. Gingras
  2. J. S. Gardner
  3. J. Greedan

In Electronic, Optical and Magnetic Materials

  1. Michel J. P. Gingras
  2. J. S. Gardner
  3. J. Greedan

Citations in the corpus