Turkish Journal of Physics
Abstract
Samples of the nominal composition (Y_{0.5}Nd_{0.5-x}Ho_x) Ba_2Cu_3O_{7- \delta} , 0 \le x \le 0.5, have been prepared using the conventional solid state reaction. The effect of holmium and neodymium substitution on electrical resistivity, transition temperature T_c, lattice parameters, size of crystallite and grain size has been investigated. X-ray diffraction, electron micro-probe, scanning electron microscope and IR spectra, have been used in our investigation. The results show that the transition temperature T_c, electron-hole jump rate and lattice parameters (a, b) have minimum values at x = 0.2, while c increases to maximum at x = 0.2. The size of crystallite, the electrical resistivity and grain size are also maximum at x = 0.2. The real composition, molecular state and electronic state of the prepared samples are discussed.
DOI
-
Keywords
Superconductors; X-ray; IR-spectra; YBCO; Ho; Nd.
First Page
329
Last Page
340
Recommended Citation
SEKKINA, M. A, TAWFIK, A. R, HEMEDA, O, DAWOUD, M. A, & EL-ATTAR, S (2005). Physical Properties of Holmium Promoted Superconductivity in Nd-Doped YBCO HT_C-Superconductors. Turkish Journal of Physics 29 (6): 329-340. https://doi.org/-
