GROWTH OF (YBACUO)(M) (PRBACUO)(N) SUPERLATTICES BY MOCVD/

[(YBaCuO)(m)/(PrBaCuO)(n)](10) multilayers have been deposited by Meta l Organic Chemical Vapor Deposition (MOCVD). The films grow on SrTiO3 (100) and MgO (100) substrates and have c-axis perpendicular to the su bstrate. A serie of superlattices has been synthesised with different deposition temperatures ranging between 700 and 850 degrees C with dif ferent modulations (the thickness of YBCO layers staying unchanged and equal to 100 Angstrom). The elements concentrations profiles at the i nterfaces and the interdiffusion were determined by secondary neutral mass spectroscopy (SNMS). X-ray diffraction show satellite peaks (char acteristic of superlattice modulation) around 001 and 002 reflections. Moreover, the samples show a good in-plane orientation. The supercond ucting properties are analysed by AC screening. The critical temperatu re reaches 88K in the case of m=8 and n=2 (n and m being the numbers o f units cells along c-axis for YBCO layer and PBCO one respectively).