TY - JOUR
KW - Oxidation
KW - Temperature
KW - Diffusion
KW - Film
KW - Thickness
KW - Metal oxide
KW - Atomic force microscopy
KW - Article
KW - Iron oxide
KW - Mathematical analysis
AU - S.R Shinde
AU - S.B Ogale
AU - V Novikov
AU - A.S Ogale
AU - Ramamoorthy Ramesh
AU - E.D Williams
AU - S Aggarwal
AB - The evolution of patterned morphology during thermal oxidation of a supported metal thin film is examined as a case of strained reaction-diffusion system; the strain originates from the large density difference between the oxide and the metal. In the moderate temperature regime, where bulk diffusion is weak, the pattern reflects the length scale of the original metal film grain structure, with local features characteristic of self-organized chemical microreactors, as well as large scale polygonal surface undulations presumably caused by stress accommodation. At higher temperature, where bulk diffusion is brisk, the process of Ostwald ripening strongly reforms the morphology formed at lower temperature, and leads to distributed spiral-type configurations. These observations and analysis are supported by a simulation study reported in the accompanying paper II by Abhijit S. Ogale [Phys. Rev. B 64, 035409 (2001)]© 2001 The American Physical Society.
BT - Physical Review B - Condensed Matter and Materials Physics
DO - 10.1103/PhysRevB.64.035408
LA - eng
M1 - 3
N1 - cited By 19
N2 - The evolution of patterned morphology during thermal oxidation of a supported metal thin film is examined as a case of strained reaction-diffusion system; the strain originates from the large density difference between the oxide and the metal. In the moderate temperature regime, where bulk diffusion is weak, the pattern reflects the length scale of the original metal film grain structure, with local features characteristic of self-organized chemical microreactors, as well as large scale polygonal surface undulations presumably caused by stress accommodation. At higher temperature, where bulk diffusion is brisk, the process of Ostwald ripening strongly reforms the morphology formed at lower temperature, and leads to distributed spiral-type configurations. These observations and analysis are supported by a simulation study reported in the accompanying paper II by Abhijit S. Ogale [Phys. Rev. B 64, 035409 (2001)]© 2001 The American Physical Society.
PY - 2001
T2 - Physical Review B - Condensed Matter and Materials Physics
TI - Self-organized pattern formation in the oxidation of supported iron thin films. I. An experimental study
VL - 64
SN - 10980121
ER -