a Department of Physics, University of Science and Technology of China, Hefei, 230026, China; b Laborotoire Léon Brillouin, CEA-CNRS, Bt.563, CEN Saclay, 91191, Gif-Sur-Yvette, France; c Laboratoire de Physique des Solides, Bt.510, Université Paris-Sud, 91405, Orsay, France
Abstract We have investigated, by X-ray diffraction, a series of single crystals of Bi-based oxides with the nominal composition Bi2Sr2(Cu1-zFez)O6+$\delta$ (0≤z≤0.55). In this system we observed two structural phase transitions with the increase of the doping content. The first transition, from an incommensurate monoclinic phase to an incommensurate orthorhombic phase, occurs at a doping content of iron zFe=0.027. The second one corresponds to a phase transition from an incommensurate orthorhombic phase to a commensurate orthorhombic phase at zFe=0.34. The comparison of these results with those for more limited substitutions of Zn and Ni indicates the significant role of the insertion of the extra oxygen in the (Bi-O)$\infty$ double layers.
Received: 11 July 1994
Accepted manuscript online:
Fund: Project supported by the foundation of State Educational Commission of China for outstanding young teachers and the funds of State Educational Commission of China for the students returned from abroad.
Cite this article:
PAN GUO-QIANG (潘国强), G. COLLIN, S. MEGTERT PHASE TRANSITIONS IN Bi2Sr2(Cu1-zFez)O6+$\delta$ 1995 Acta Physica Sinica (Overseas Edition) 4 448
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