Phase Separation and Microstructure in Superconducting FeSe1-xTex Materials

Andrea Masi, Carlo Alvani, Andrea Augieri, Mariangela Bellusci, Giuseppe Celentano, Gianluca De Marzi, Fabio Fabbri, Chiarasole Fiamozzi Zignani, Aurelio La Barbera, Franco Padella, Marzia Pentimalli, Enrico Silva, Angelo Vannozzi, Francesca Varsano

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Abstract

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 FeSe0.5Te0.5materials 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.
Original languageEnglish
Article number8252809
Pages (from-to)-
JournalIEEE Transactions on Applied Superconductivity
Volume28
Issue number4
DOIs
Publication statusPublished - 1 Jun 2018
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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