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Ba2(Cu0.7Cd0.3)O3: a new double-center perovskite structure |
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| Authors: | W.J. Yu Zh.Q. Mao Sh.J. Feng M.L. Tian G.E. Zhou Y.H. Zhang |
| Affiliation: | a Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China b CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China and Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China |
| Abstract: | A new phase of Ba2(Cu0.7Cd0.3)O3 has been discovered. The composition of the phase was examined by energy dispersive X-ray spectrometry. The phase exhibits a tetragonal structure with lattice constants a=4.077 Å and c=7.970 Å, and its space group is P4/mmm. We propose a double-center-perovskite structure model, which is similar to that of (Ba, Sr)2CuO2(CO3) [1, 2]. The simulated XRD is close to the observed one. The analysis results of elemental analyzer and Fourier transform infrared spectrometer reveal that the phase does not contain CO. The cuprate is an insulator, but its new cell structure and the large size of the CuO2 planes seem to suggest a good reason for researching new superconductors. The roles of CdO in the solid state reaction and the formation of the new phase are discussed. |
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