X-RAY-INTENSITY FLUCTUATION SPECTROSCOPY OBSERVATIONS OF CRITICAL-DYNAMICS IN FE3AL

被引：166

作者：

BRAUER, S

STEPHENSON, GB

SUTTON, M

BRUNING, R

DUFRESNE, E

MOCHRIE, SGJ

GRUBEL, G

ALSNIELSEN, J

ABERNATHY, DL

机构：

[1] IBM CORP,DIV RES,TJ WATSON RES CTR,YORKTOWN HTS,NY 10598

[2] MCGILL UNIV,CTR PHYS MAT,MONTREAL,PQ H3A 2T8,CANADA

[3] MCGILL UNIV,DEPT PHYS,MONTREAL,PQ H3A 2T8,CANADA

[4] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[5] EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.74.2010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：2010 / 2013

页数：4

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