Magnetic critical scattering in solid Co80Pd20
H E Fischer1, L Hennet, V Cristiglio
1Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble cedex 9, France.
Abstract:
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 Co80Pd20. 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 Tc. This value of ν is consistent with the prediction of the three-dimensional Heisenberg model for magnetic critical scattering.
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