X-ray intensity fluctuation spectroscopy observations of critical dynamics in Fe3Al

S. Brauer; G. B. Stephenson; M. Sutton; R. Brüning; E. Dufresne; S. G.J. Mochrie; G. Grübel; J. Als-Nielsen; D. L. Abernathy

doi:10.1103/PhysRevLett.74.2010

X-ray intensity fluctuation spectroscopy observations of critical dynamics in Fe3Al

S. Brauer, G. B. Stephenson, M. Sutton, R. Brüning, E. Dufresne, S. G.J. Mochrie, G. Grübel, J. Als-Nielsen, D. L. Abernathy

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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.

Original language	English
Pages (from-to)	2010-2013
Number of pages	4
Journal	Physical Review Letters
Volume	74
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.74.2010
State	Published - 1995
Externally published	Yes

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title = "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.",

author = "S. Brauer and Stephenson, {G. B.} and M. Sutton and R. Br{\"u}ning and E. Dufresne and Mochrie, {S. G.J.} and G. Gr{\"u}bel and J. Als-Nielsen and Abernathy, {D. L.}",

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doi = "10.1103/PhysRevLett.74.2010",

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T1 - X-ray intensity fluctuation spectroscopy observations of critical dynamics in Fe3Al

AU - Brauer, S.

AU - Stephenson, G. B.

AU - Sutton, M.

AU - Brüning, R.

AU - Dufresne, E.

AU - Mochrie, S. G.J.

AU - Grübel, G.

AU - Als-Nielsen, J.

AU - Abernathy, D. L.

PY - 1995

Y1 - 1995

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevLett.74.2010

DO - 10.1103/PhysRevLett.74.2010

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VL - 74

SP - 2010

EP - 2013

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

ER -

X-ray intensity fluctuation spectroscopy observations of critical dynamics in Fe3Al

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