COMBINED 3-DIMENSIONAL POLARIZATION ANALYSIS AND SPIN-ECHO STUDY OF SPIN-GLASS DYNAMICS

We report direct measurements of the time-dependent spin correlation function S(k, t) for a Cu-Mn spin glass alloy over nearly 3 decades of time in a single scan in the range 10-12 < t < 10-9s. This was achieved by using, for the first time, a combination of neutron spin echo and polarization analysis techniques. The results show most clearly the particular dynamics of spin glasses, namely a behaviour that can be described by a spectrum of relaxation times spreading over a wide range. © 1979.