科研之友
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摘要
This work presents the results of the resistivity vs. temperature measurements obtained under different excitation currents, carried out on Nd1.783Ce0.15CuO3.989 followed by the new analytical formula Nd2-(4x+v-2)/3Ce0.15CuOy. 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.
- 出版日期2007-3-20
