Scaling in the time domain: universal dynamics of order fluctuations in Fe3Al.
By focusing a highly brilliant synchrotron x-ray beam to a micrometer spot on a sample, we measured in real time the x-ray intensity fluctuations associated with order fluctuations in crystalline materials. We applied this method to the binary alloy Fe3Al near its continuous A2-B2 phase transformation and determined a specific four-point time correlation function for the order parameter. From a detailed theoretical analysis, dynamical scaling in the time domain with a transition from noncritical to critical dynamics is disclosed.
Mocuta
Cristian
C
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany.
Reichert
Harald
H
Mecke
Klaus
K
Dosch
Helmut
H
Drakopoulos
Michael
M