Structure stability of epitaxial MgO-CaO solid-solution films: effect of diffusion

Journal Article · Tue May 15 00:00:00 EDT 2007 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2732411· OSTI ID:20982905

Li, H D; Zhang, X N; Zhang, Z; Mei, Z X; Du, X L; Xue, Q K ^[1]

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1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)

The nonequilibrium epitaxial growth process of Mg{sub x}Ca{sub 1-x}O solid-solution films at 600 degree sign C is carefully investigated. No obvious phase separation is observed until annealing at 800 degree sign C despite a large miscibility gap. The solid-solution film is featured with disorder alloy as confirmed by transmission electron microscopy (TEM). Spinodal decomposition caused by uprising diffusion happens after short-time annealing which explicitly indicates the structure stability of the metastable solid-solution films does result from diffusion quenching.

• OSTI ID: 20982905
• Journal Information: Journal of Applied Physics, Vol. 101, Issue 10; Other Information: DOI: 10.1063/1.2732411; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CALCIUM OXIDES
CRYSTAL GROWTH
DECOMPOSITION
DIELECTRIC MATERIALS
DIFFUSION
LAYERS
MAGNESIUM OXIDES
MOLECULAR BEAM EPITAXY
PLASMA
SOLID SOLUTIONS
SOLUBILITY
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY