Phase Separation and Microstructure in Superconducting FeSe1-xTex Materials

TitlePhase Separation and Microstructure in Superconducting FeSe1-xTex Materials
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2018
AuthorsMasi, A., Alvani C., Augieri A., Bellusci M., Celentano G., De Marzi G., Fabbri F., Zignani C.F., La Barbera A., Padella F., Pentimalli M., Silva E., Vannozzi A., and Varsano F.
JournalIEEE Transactions on Applied Superconductivity
KeywordsChemical analysis, cooling, Crystal growth, Different-magnetic fields, High temperature melts, High temperature superconductors, Iron-based Superconductors, Magnetic field measurement, Magnetic fields, Magnetization measurements, Micro-structural observations, Organic superconducting materials, Phase separation, Super conducting phasis, Superconducting materials, Superconducting materials growth, Superconducting materials measurements, Superconducting properties, Temperature, Temperature measurement, X ray scattering

In the effort to unveil the relations between synthesis conditions, morpho-structural features and superconducting properties of (11)-type iron-based superconductors, this study is focused on FeSe0.5Te0.5 materials obtained from high-temperature melts and different cooling rates. Crystalline and chemical composition are evaluated by means of XRD and SEM analyses, highlighting the formation of complex multiphase structures: the obtained results suggest that high-temperature nucleating phases may play a key role in the observed phase separation. Superconducting properties, evaluated by magnetization measurement and dc electrical resistance in different magnetic field conditions up to 18 T, highlight the low homogeneity of the superconducting phases, reflecting the microstructural observation. © 2002-2011 IEEE.


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