High temperature Mössbauer studies of 57Fe: YSr2Cu3O7 related compounds containing oxyanions |
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| Authors: | Angel Bustamante Domínguez RB Scorzelli E Baggio Saitovitch |
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| Institution: | (1) Centro Brasileiro de Pesquisas Fisicas, Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro, Brazil;(2) Facultad de Ciencias Fisicas, Universidad Nacional Mayor de San Marcos, Apdo. Postal 14-0149, Lima, 14, Perú |
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| Abstract: | Oxyanion substitutions at the copper sites can stabilize the Ba free phase YSr2Cu3O7 and allow synthesis to occur under ambient conditions (P.R. Slater and C. Greaves, 1991; P.R. Slater et al., 1993). Here we report in situ 57Fe Mössbauer spectroscopy experiments done in Y--Sr--Cu--O related oxides containing sulphate (SO4 2-), phosphate (PO4 3-) and borate (BO3 3-), in the temperature range 300 K ? T ? 723 K. From the results obtained it has been possible to study the kinetics of oxygen loss, as well as the temperature dependence of the Fe species. |
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