Abstract
This work presents the results of the resistivity vs. temperature measurements obtained under different excitation currents, carried out on Nd 1.783 Ce 0.15 CuO 3.989 followed by the new analytical formula Nd 2-(4x + v-2)/3 Ce 0.15 CuO y. The measurements revealed different characteristics for different parts of the investigated sample. The obtained results may suggest the idea that double resistive superconducting transition in n-type polycrystalline cuprates is of a rather extrinsic future. The electron microscope photography applied in order to investigate the microstructure of the chosen samples also supported the above view.
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