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Using small-angle neutron scattering combined with a containerless aerodynamic levitation technique for high temperatures, we have measured the temperature dependence of the correlation length ξ of near-critical magnetic fluctuations in the solid phase of the completely miscible fcc alloy CoPd. A fit to our data yields a critical exponent ν = 0.76 ± 0.05 for the divergence of ξ(T) above the ferromagnetic transition temperature T. This value of ν is consistent with the prediction of the three-dimensional Heisenberg model for magnetic critical scattering.
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| http://dx.doi.org/10.1088/0953-8984/19/41/415106 | DOI Listing |
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