Crystal structure refinement of Co-doped YBCO with the Rietveld method
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This exercise consists of refining the crystal structure of Co-doped YBCO.
Explanations are provided in the document YBCO_Tutorial.pdf
The PDF document is a little bit outdated, however the main points are discussed 
within it. For doing this tutorial it is advised to follow the document and try by
yourself to construct the PCR files using the information of the document. 

Directory          Purpose                      Documents
----------------------------------------------------------
YBCO              Refinement of the           YBCO_Tutorial.doc
                  crystal structure
                  of YBa2Cu3O7 doped with Co

We provide a series of PCR files for comparing with those written by the user:
Cocuc_LeBail.pcr                    -> Le Bail fit using Npr=5
Cocus_start-excl.pcr                -> Starting Rietveld PCR file with the first peak excluded
Cocus-excl.pcr                      -> Rietveld PCR file after some refinement with the first peak excluded
Cocus-firstpeak.pcr                 -> As above but including the first strongly asymmetric peak
Cocus-asym.pcr                      -> Full treatment using Npr=7, asymmetry and Chebychev polynomials for background
