Dynamic critical behavior of disordered 3D Heisenberg ferromagnets
M. Alba, S. Pouget
Abstract
The influence of a strong disorder on the critical dynamics of 3D Heisenberg ferromagnet was investigated by high-resolution quasielastic neutron scattering. A new disorder-induced dynamical critical behavior was found, characterized by its critical exponent z=2.3. The dynamical scaling function appeared mainly unaffected by disorder but its description led to a new parameterization of the Renormalization Group theory, as in the case of pure Nickel.
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