About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review Letters
Paper
X-ray intensity fluctuation spectroscopy observations of critical dynamics in Fe3Al
Abstract
We have carried out intensity fluctuation spectroscopy measurements using coherent x rays to study the dynamics of critical fluctuations in a binary alloy at equilibrium. An intense coherent hard x-ray beam, produced from an undulator source, was scattered from a single crystal of Fe3Al held at temperatures near the B2-DO3 order-disorder transition. A speckle pattern was observed at the (12 12 12) superlattice reflection. Below Tc it was essentially static, while above Tc it fluctuated in time. The behavior of the normalized time correlation function is consistent with predictions of theory. © 1995 The American Physical Society.