Phase Separation and Microstructure in Superconducting FeSe1-xTex Materials

被引：12

作者：

Masi, Andrea ^{[1
]}

Alvani, Carlo ^{[2
]}

Augieri, Andrea ^{[3
]}

Bellusci, Mariangela ^{[2
]}

Celentano, Giuseppe ^{[3
]}

De Marzi, Gianluca ^{[3
]}

Fabbri, Fabio ^{[2
]}

Zignani, Chiarasole Fiamozzi ^{[3
]}

La Barbera, Aurelio ^{[2
]}

Padella, Franco ^{[2
]}

Pentimalli, Marzia ^{[2
]}

Silva, Enrico ^{[1
]}

Vannozzi, Angelo ^{[3
]}

Varsano, Francesca ^{[2
]}

机构：

[1] Univ Roma Tre, I-00146 Rome, Italy

[2] ENEA Ctr Ric Casaccia, I-00123 Rome, Italy

[3] ENEA Ctr Ric Frascati, I-00044 Frascati, Italy

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2018年 / 28卷 / 04期

关键词：

Superconducting materials growth; superconducting materials measurements; crystal growth; FESE0.5TE0.5;

D O I：

10.1109/TASC.2018.2791547

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页数：5

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