Effect of Eu(Pr) Substitution at Ba Sites on Microstructure and Superconductivity in EuBa2Cu3O7-δ Ceramics
PENG Zhen-sheng1, WANG Zhi-he2
1. Suzhou Normal College, Physics Department, Suzhou 234000，China 2. Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 214100, China
Abstract：Ceramics of Eu1+xBa2-xCu3O7-δ with x=0.0, 0.05, 0.1, 0.2, 0.3, 0.4，0.5 and EuBa2-xPrxCu3O7-δ with x=0.0, 0.05, 0.1, 0.2, 0.3，0.4 have been synthesized and investigated by X-ray diffraction, resistivity, and Raman spectroscopy. The results show that the transition of crystal structure from orthorhombic to tetragonal occurs and the critical temperature decreases with the increase in doping concentration x. The Raman spectra show that the frequency of the Cu(1)—O(4) stretching mode and the Cu(2)—O(2, 3) out-of-phase mode shifts to higher wave number with increasing doping concentration x.
Key words：High-temperature superconduction;Structure transition;Method of element substitution
彭振生1，王智河2 . Eu(Pr)替代Ba位对EuBa2Cu3O7-δ晶体结构及其超导电性的影响 [J]. 光谱学与光谱分析, 2004, 24(04): 451-454.
PENG Zhen-sheng1, WANG Zhi-he2 . Effect of Eu(Pr) Substitution at Ba Sites on Microstructure and Superconductivity in EuBa2Cu3O7-δ Ceramics . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(04): 451-454.
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