Quantum and thermal spin relaxation in the diluted spin ice Dy2xMxTi2O7 (M=Lu,Y)

J. Snyder, B. G. Ueland, Ari Mizel, J. S. Slusky, H. Karunadasa, R. J. Cava, and P. Schiffer
Phys. Rev. B 70, 184431 – Published 23 November 2004

Abstract

We have studied the low-temperature ac magnetic susceptibility of the diluted spin ice compound Dy2xMxTi2O7, 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, 0x1.98, and we find that the T16K 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.

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  • Received 11 May 2004

DOI:https://doi.org/10.1103/PhysRevB.70.184431

©2004 American Physical Society

Authors & Affiliations

J. Snyder1, B. G. Ueland1, Ari Mizel1, J. S. Slusky2, H. Karunadasa2, R. J. Cava2, and P. Schiffer1,*

  • 1Department of Physics and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA
  • 2Department of Chemistry and Princeton Materials Institute, Princeton University, Princeton, New Jersey 08540, USA

  • *Electronic mail: schiffer@phys.psu.edu

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Vol. 70, Iss. 18 — 1 November 2004

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