Mössbauer study of tin-doped 1-2-3 and 2-1-4 highT
c superconductors |
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| Authors: | G Quintana R C Mercader |
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| Institution: | (1) Departamento de Física, Facultad de Ingenieria, Universidad de Buenos Aires, Paseo Colón 850, 1063 Buenos Aires, Argentina;(2) Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata, Argentina |
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| Abstract: | Samples of YBa2(Cu0.85Sn0.15)3O7–y
(1-2-3), La2(Cu0.95Sn0.05)O44–x, and La1.85Ba0.15(Cu0.95Sn0.05)O4–x
(2-1-4), with different oxygen stoichiometry, have been studied by Mössbauer spectroscopy. These measurements reveal the existence of two inequivalent sites for Sn in the (1-2-3) compounds. The (1-2-3) spectra display two quadrupole doublets which we associate with Sn in Cu(1) and Cu(2) sites, respectively. La compounds show a single quadrupole doublet. |
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