Neutron-Scattering Measurement of the Edwards-Anderson Order Parameter for a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Cu</mml:mi></mml:math>-Mn Spin-Glass Alloy

Abstract

We have carried out neutron inelastic scattering measurements on a Cu-8-at.%-Mn alloy employing different energy resolutions varying over two orders of magnitude. The temperature dependence of the elastic magnetic scattering cross section which is related to the Edwards-Anderson order parameter is found to vary systematically with the energy resolution employed to separate the elastic scattering from the inelastic/quasielastic contributions and hence on the effective time constant of measurement.