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Scaling in the Time Domain: Universal Dynamics of Order Fluctuations in Fe3Al

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Science  27 May 2005:
Vol. 308, Issue 5726, pp. 1287-1291
DOI: 10.1126/science.1110001

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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.

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