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Thermal properties of the magnetic RuSr |
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| Authors: | G. A. Costa A. Ubaldini C. Artini M. M. Carnasciali R. Masini |
| Affiliation: | (1) INFM (LAMIA) and DCCI, Universitá di Genova, Via Dodecaneso 31, 16146 Genova, Italy;(2) INFM (LAMIA) and DCCI, Universitá di Genova, Via Dodecaneso 31, 16146 Genova, Italy;(3) INFM (LAMIA) and DCCI, Universitá di Genova, Via Dodecaneso 31, 16146 Genova, Italy;(4) INSTM and DCCI, Universitá di Genova, Via Dodecaneso 31, 16146 Genova, Italy;(5) CNR-IMEM, Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy |
| Abstract: | Summary A thermal study was performed on the RuSr2GdCu2O8 (Ru-1212) magnetic superconductor phase to investigate the effect of the annealing treatments in flowing O2 on the stability limit of the phase and on its structural, magnetic and transport properties. DTA-TG measurements were utilized to determine the decomposition process and the dependence of the decomposition temperature on the annealing atmosphere. The decomposition of the Ru-1212 phase was found sensitive to the oxygen partial pressure and increases with PO2 and the annealing time. The annealing treatments exert a depressing effect on the strength of the magnetic interaction, an enhancement on the superconductive properties and the vanishing of the magnetostriction. A decomposition reaction of Ru-1212 phase was proposed and discussed. |
| Keywords: | EGA DTA-TG superconductivity phase stability ruthenates |
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