Rb2Cu1−xCoxF4, a two-dimensional Ising spin glass
- 15 April 1988
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 63 (8) , 4334-4336
- https://doi.org/10.1063/1.340193
Abstract
We report on the dc susceptibility of the insulating spin glass Rb2Cu1−xCoxF4, with x=0.22. This model compound is a realization of the two‐dimensional short‐range Edwards–Anderson model, which has competing nearest‐neighbor Ising interactions. Below a frequency‐dependent freezing temperature spin‐glass behavior is observed for longitudinal spin components only. The nonlinear part of the susceptibility is found to excellently obey static Tc=0 scaling with β=0.0±0.1 and Δ=3.2±0.2, in conformity with the Monte Carlo results for the two‐dimensional Edwards–Anderson model, Tc=0, β=0, and Δ=3.5±0.5. These findings thus provide experimental evidence for the lower critical dimensionality for Ising spin glasses to exceed 2.This publication has 17 references indexed in Scilit:
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