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Preparative and Mössbauer studies of Bi2Sr2Ca n-1Cu n O y compounds withn=2 or 3 |
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| Authors: | I. Tittonen J. Hietaniemi J. Huttunen T. Karlemo M. Karppinen T. Katila J. Lindén L. Niinistö K. Ullakko |
| Affiliation: | (1) Department of Technical Physics, Helsinki University of Technology, SF-02150 Espoo, Finland;(2) Laboratory of Inorganic and Analytical Chemistry, Helsinki University of Technology, SF-02150 Espoo, Finland;(3) Laboratory of Engineering Materials, Helsinki University of Technology, SF-02150 Espoo, Finland |
| Abstract: | The influence of sintering temperatures and nominal starting compositions on the phase contents of polycrystalline Bi2Sr2Ca n-1Cu n O4+2n samples are reported. After every sintering the samples were characterized with X-ray diffraction and magnetic AC susceptibility measurements. For Mössbauer studies, in each case also a corresponding specimen containing57Fe was synthetized. The identification of various superconducting Bi2Sr2Ca n-1Cu n O4+2n phases on the basis of Mössbauer spectra consisting usually of three quadrupole doublets is discussed. |
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