Specific Process Knowledge/Characterization/XPS/Processing/ALDSandwich1/3scanned: Difference between revisions
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In the red square it is seen that the constraints on some of the peak parameters are changed compared to the fittings of the Al2p and Hf4f peaks: | In the red square it is seen that the constraints on some of the peak parameters are changed compared to the fittings of the Al2p and Hf4f peaks: | ||
* The FWHM are no longer required to be equal. This will open up for the broadening of the Ti2p<sub>1/2</sub> peak. In the previous fittings, the correct ratio between the two peaks in the the spin-orbit couples was maintained by the requirements that the FWHM were identical and the Height CPS had a ratio | * The FWHM are no longer required to be equal. This will open up for the broadening of the Ti2p<sub>1/2</sub> peak. In the previous fittings, the correct ratio between the two peaks in the the spin-orbit couples was maintained by the requirements that the FWHM were identical and the Height CPS had a specific ratio (hence the area ratio would be correct, see for instance the Al2p fitting parameters in the top image on this page). This constraint is gone now. However, with the addition of the asymmetry parameters (see below), the area requirement would be difficult to maintain anyway. | ||
* The Lorentzian-to-Gaussian ratio is freed. Before, it was set to 100. | |||
* The three asymmetry parameters 'Tail Mix', 'Tail Height' and 'Tail Exponent' are also free to find a minimum within some restricted range on the condition that the parameters of the two peaks be the same. | |||
An optimum fit is produced and accepted. In this case the outcome of the fitting is irrelevant for us - the interesting part is the the Peak table. To save it, click the 'Save Peak Table' button shown in the green square and save as *.vgt file. | |||