Metastable vs. unstable growth in the subsurface ordering dynamics of (001)
Max-Planck-Institut für Metallforschung -
Heisenbergstr. 1, 70569 Stuttgart, Germany
2 University of Illinois at Urbana-Champaign - Urbana, Illinois 61801, USA
Accepted: 18 December 2000
A surface-sensitive X-ray line shape analysis of the ordering process in (001) has been performed following a rapid temperature quench from the disordered phase into the ordered phase. We study the temporal evolution of ordered domains in the subsurface region. We find distinct and anisotropic antiphase domain patterns in the unstable and metastable growth mode. This leads to rather unusual surface-induced coarsening schemes.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 61.10.Eq – X-ray scattering (including small-angle scattering) / 64.60.My – Metastable phases
© EDP Sciences, 2001