Pseudospinodal Mode of Decomposition in Films and Formation of Chessboard-Like Nanostructure
- 29 July 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 9 (9), 3275-3281
- https://doi.org/10.1021/nl901551j
Abstract
A new decomposition mode, a coherent pseudospinodal decomposition under geometrically confined conditions, is discovered. This mode is associated with a coupling of the decomposition with the displacive crystal lattice rearrangement and results in a gradual separation of compositions of two product phases. We consider a particular case of decomposition in an epitaxial thin film. The 3D phase field microelasticity modeling demonstrates that the confined pseudospinodal decomposition dramatically affects the thermodynamics, kinetics and morphology of the system producing a vertically aligned and highly correlated regular chessboard pattern of two product phases. The study reveals the physical origin of the chessboard structure. The computer modeling predicts its geometry in striking agreement with the existing observations. The modeling shows that the transformation develops through a so-called tweed precursor state observed in many martensitic systems.This publication has 22 references indexed in Scilit:
- From chessboard tweed to chessboard nanowire structure during pseudospinodal decompositionNature Materials, 2009
- Strain control and spontaneous phase ordering in vertical nanocomposite heteroepitaxial thin filmsNature Materials, 2008
- Highly Aligned Epitaxial Nanorods with a Checkerboard Pattern in Oxide FilmsNano Letters, 2008
- Multiferroics: progress and prospects in thin filmsNature Materials, 2007
- Controlling Self-Assembled Perovskite−Spinel NanostructuresNano Letters, 2006
- Self-assembled single-crystal ferromagnetic iron nanowires formed by decompositionNature Materials, 2004
- Multiferroic BaTiO 3 -CoFe 2 O 4 NanostructuresScience, 2004
- Structural phase transition at the percolation threshold in epitaxial (La0.7Ca0.3MnO3)1–x:(MgO)x nanocomposite filmsNature Materials, 2003
- Structural aspects of AuCu I or AuCu II and a cuboidal block configuration of f.c.c. disordered phase in AuCuPt and AuCuAg pseudobinary alloysMaterials Science and Engineering: A, 1995
- Electron microscopy study of the coherent two-phase mixtures L10+ L12, in Co–Pt alloysPhilosophical Magazine Part B, 1991