Quantum and thermal spin relaxation in the diluted spin ice Dy2−xMxTi2O7 (M=Lu,Y)
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Issue Date
2004-11-23Author
Snyder, J.
Ueland, B. G.
Mizel, Ari
Slusky, Joanna
Karunadasa, H.
Cava, R. J.
Schiffer, P.
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
©2004 American Physical Society
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Show full item recordAbstract
We have studied the low-temperature ac magnetic susceptibility of the diluted spin ice compound Dy2−xMxTi2O7, 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∼16K 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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Citation
Snyder, J., Ueland, B. G., Mizel, A., Slusky, J. S., Karunadasa, H., Cava, R. J., & Schiffer, P. (2004). Quantum and thermal spin relaxation in the diluted spin ice Dy 2− x M x Ti 2 O 7 (M= Lu, Y). Physical Review B, 70(18), 184431.
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