Development of Fe(Se,Te) Coated Conductors by PLD Process for High Magnetic Field Applications

IF 1.7 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-09 DOI:10.1109/TASC.2024.3511534

Linfei Liu;Yijie Li;Shaojing Mou;Chaohang Miao;Rongji Zhu;Ruojie Li;Jiachao Ye

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Abstract

Iron-chalcogenide superconductors are a fascinating group within the family of iron-based superconductors, known for their non-toxic, simple crystal structures, less anisotropy and high critical current density. Fe(Se,Te) films have been realized on flexible metal substrates, and the Fe(Se,Te) coated conductors have high critical current density J _c at 4.2 K under magnetic fields as high as 25 T. This makes them promising for high field applications at liquid helium temperature. For applications, the continuous fabrication of Fe(Se,Te) coated conductors is a key. Here, the Fe(Se,Te) coated conductors were developed through multi-turn pulsed laser deposition on CeO ₂ buffered ion-beam-assisted deposition MgO tape. The effect of parameters on the properties of the Fe(Se,Te) films were systematically studied, such as substrate temperature and target-substrate distance. Under the optimum process, high performance Fe(Se,Te) film was successfully fabricated with critical current density of 0.8 MA/cm ² at 4.2 K and 12 T. So far, 10 m and 100 m class Fe(Se,Te) coated conductors have been successfully fabricated in Shanghai Jiao Tong university. 120 m long FST coated conductor with T _c of about 14 K and J _c of 0.83 MA/cm ² at 4.2 K and 10 T was obtained, which demonstrates the fabrication of long Fe(Se,Te) coated conductor with high performance.

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用PLD工艺制备高磁场用Fe（Se,Te）涂层导体

铁硫系超导体是铁基超导体家族中一个令人着迷的群体，以其无毒，简单的晶体结构，较少的各向异性和高临界电流密度而闻名。在柔性金属衬底上实现了Fe（Se,Te）薄膜，在高达25 t的磁场下，Fe（Se,Te）涂层导体在4.2 K下具有较高的临界电流密度Jc，这使得它们在液氦温度下的高场应用前景广阔。对于应用来说，连续制造Fe（Se,Te）涂层导体是关键。在CeO2缓冲离子束辅助沉积MgO带上，通过多圈脉冲激光沉积制备了Fe（Se,Te）涂层导体。系统地研究了衬底温度、靶-衬底距离等参数对Fe（Se,Te）薄膜性能的影响。在最佳工艺条件下，在4.2 K和12 t条件下成功制备出了临界电流密度为0.8 MA/cm2的高性能Fe（Se,Te）薄膜。目前，上海交通大学已成功制备出10 m级和100 m级Fe（Se,Te）涂层导体。在4.2 K和10 T条件下，获得了120 m长的FST涂层导体，Tc约为14 K， Jc为0.83 MA/cm2，证明了制备出高性能的Fe（Se,Te）涂层导体。

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来源期刊

IEEE Transactions on Applied Superconductivity 工程技术-工程：电子与电气

CiteScore

3.50

自引率

33.30%

发文量

650

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.