Physics – Data Analysis – Statistics and Probability
Scientific paper
2007-04-08
J. Stat. Mech. (2006) P09017
Physics
Data Analysis, Statistics and Probability
8 pages, 6 figures;
Scientific paper
We have studied the effect of annealing temperature on the statistical properties of $WO_3$ surface using atomic force microscopy techniques (AFM). We have applied both level crossing and structure function methods. Level crossing analysis indicates an optimum annealing temperature of around 400$^oC$ at which the effective area of the $WO_3$ thin film is maximum, whereas composition of the surface remains stoichiometric. The complexity of the height fluctuation of surfaces was characterized by roughness, roughness exponent and lateral size of surface features. We have found that there is a phase transition at around 400$^oC$ from one set to two sets of roughness parameters. This happens due to microstructural changes from amorphous to crystalline structure in the samples that has been already found experimentally.
Azimirad R.
Jafari G. R.
Moshfegh A. Z.
Rouhani Shahin
Saberi Abbas Ali
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