Quantum and thermal spin relaxation in the diluted spin ice Dy 2-xMxTi2O7 (M=Lu, Y)

J. Snyder, B. G. Ueland, Ari Mizel, J. S. Slusky, H. Karunadasa, R. J. Cava, P. Schiffer

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Abstract

We have studied the low-temperature ac magnetic susceptibility of the diluted spin ice compound Dy2-xMxTi2O 7, where the magnetic Dy ions on the frustrated pyrochlore lattice have been replaced with nonmagnetic ions, M=Y or Lu. We examine a broad range of dilutions, 0≤x≤1.98, and we find that the T ∼ 16 K freezing is suppressed for low levels of dilution but re-emerges for x>0.4 and persists to x=1.98. This behavior can be understood as a nonmonotonic dependence of the quantum spin relaxation time with dilution. The results suggest that the observed spin freezing is fundamentally a single spin process that is affected by the local environment, rather than the development of spin-spin correlations as earlier data suggested.

Original languageEnglish (US)
Article number184431
Pages (from-to)1-6
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number18
DOIs
StatePublished - Nov 1 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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