The distribution of elements in sequentially prepared MgB2 on SiC buffered Si substrate and possible pinning mechanisms

► Superconducting MgB2 thin films were prepared on SiC substrates by sequential method. ► XPS spectra indicate that SiC is not incorporated into MgB2 film but the distribution of carbon and silicon in the film is observed. ► XPS spectra indicate a reaction between MgB2 and MgO at higher temperature (830 °C). ► XPS spectrum suggests the possibility of the substitution carbon for boron in MgB2.