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- Title
NEUTRON DIFFRACTION STUDY ON.
- Authors
Zhang, Baisheng; Ye, Chuntang; Yang, Zhen; Jin, Lan; Gan, Shu; Li, Songlin; Hu, Huachen; Zheng, Xiangmiao; Chen, Fengxiang; Zhang, Wanjing; Li, Chuanyi; Wu, Ke; Chen, Kaixuan
- Abstract
The structure of high Tc(88.7K) superconductor has been studied at room temperature as well as at a temperature slightly below transition temperature by neutron powder diffraction technique. The room temperature data has been analysed using powder profile refinement based on the space group Pmmm. The structure parameters from the profile refinement are: lattice constants a=3.8033A, , with Y at 1h(0.5 0.5 0.5), Ba at 2t(0.5 0.5 0.1882), Cu-1 at 1a(0 0 0), Cu-2 at 2q(0 0 0.3565), O-1 at 2q(0 0 0.1600), O-2 at 2s(0.5 0 0.3767), O-3 at 2r(0 0.5 0.3795), O-4 at 1e(0 0.5 0) and O-5 at 1b(0.5 0 0). All sites except 2s, 1b, 1e are fully occupied; the refined populations for 2s, 1b, 1e are 1.74, 0.42, and 0.69 respectively, with , . Thus, we get an oxygen deficiency . It seems that no evidence for structural phase transition accompanying the superconducting transition was observed.
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 1987, Vol 1, Issue 2, p291
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979287000359