X-ray intensity fluctuation spectroscopy studies of ordering kinetics in a Cu-Pd alloy
- LTPCM-ENSEEG-INPG, UMR-CNRS No. 5614, Boite Postale 75-38402 Saint Martin d'Heres Cedex (France)
X-ray intensity fluctuation spectroscopy has been used to examine the coarsening kinetics in the classic long-period superlattice Cu-Pd alloy. The evolution of the speckle intensity was examined near the centers of both a superlattice peak (associated with local L1{sub 2} order) and a satellite peak (associated with one-dimensional antiphase correlations). The decay of the two-time correlation function C(t{sub 1},t{sub 2},q) was independent of the direction examined and was similar for the superlattice and satellite peaks. In agreement with published Langevin theory and simulations, the decay time {tau} of the two-time correlation function increases linearly with average time t{sub m}=(t{sub 1}+t{sub 2})/2. It is relatively independent of the wave vector near the peak centers. However, {tau} increases much more slowly with increasing t{sub m} than is expected.
- OSTI ID:
- 20719612
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 14; Other Information: DOI: 10.1103/PhysRevB.72.144201; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Neutron-scattering study of stripe-phase order of holes and spins in La{sub 1.48}Nd{sub 0.4}Sr{sub 0.12}CuO{sub 4}
Potential, pressure and density fluctuation measurements on the RENTOR tokamak using an ion beam probe