Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Suppression of Pauling's residual entropy in the dilute spin ice (Dy1-xYx)2Ti2O7


Valldor,  M.
Martin Valldor, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Scharffe, S., Breunig, O., Cho, V., Laschitzky, P., Valldor, M., Welter, J. F., et al. (2015). Suppression of Pauling's residual entropy in the dilute spin ice (Dy1-xYx)2Ti2O7. Physical Review B, 92(18): 180405, pp. 1-5. doi:10.1103/PhysRevB.92.180405.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-1D7E-B
Around 0.5 K, the entropy of the spin ice Dy2Ti2O7 has a plateaulike feature close to Pauling's residual entropy derived originally for water ice, but an unambiguous quantification towards lower temperature is prevented by ultraslow thermal equilibration. Based on the specific-heat data of (Dy1-xYx)(2)Ti2O7 we analyze the influence of nonmagnetic dilution on the low-temperature entropy. With increasing x, the ultraslow thermal equilibration rapidly vanishes, the low-temperature entropy systematically decreases, and its temperature dependence strongly increases. These data suggest that a nondegenerate ground state is realized in (Dy1-xYx)(2)Ti2O7 for intermediate dilution. This contradicts the expected zero-temperature residual entropy obtained from a generalization of Pauling's theory for dilute spin ice, but is supported by Monte Carlo simulations.