title: Scaling in the time domain: universal dynamics of order fluctuations in Fe3Al.
abstract: 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.
authors.affiliation: Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany.
authors.forename: Cristian
authors.initials: C
authors.lastname: Mocuta
authors.forename: Harald
authors.initials: H
authors.lastname: Reichert
authors.forename: Klaus
authors.initials: K
authors.lastname: Mecke
authors.forename: Helmut
authors.initials: H
authors.lastname: Dosch
authors.forename: Michael
authors.initials: M
authors.lastname: Drakopoulos