NEW SYNTHESIS METHOD OF SUPERCONDUCTING ND2CUO4-XFX, PR2CUO4-XFX

The first example of anion doped high Tc material Nd2CuO4-xFx was rece ntly discovered by James, Zahurak et al. In order to increase the amou nt of superconducting material we used new preparation routes. A two s tep process was used: preparation of T Nd2CuO4 and Pr2CuO4 phases and then fluorination. The preparation of T rare earth cuprates used are: oxides, hydroxide, oxalic and propionate synthesis method. The fluorin ation was done by reaction with NH4F under neutral gas. Using the prev ious way, large diamagnetism signal was observed as well on Nd2CuO4-xF x as on Pr2CuO4-xFx. X-ray and magnetic studies show as evidence an im provement of compounds.