Fabrication of FeSe superconducting films with chemical transport deposition process

29th International Symposium on Superconductivity

Feng, J.Q.^1 ; Zhang, S.N.^1 ; Liu, J.X.^1,2 ; Hao, Q.B.^1 ; Li, C.S.^1 ; Zhang, P.X.^1

Northwest Institute for Non-Ferrous Metal Research, Xi'an

710016, China^1

School of Materials and Metallurgical, Northeast University, Shenyang

110016, China^2

关键词: Chemical transport;    Deposition process;    Fabrication process;    Heat treatment process;    Heating process;    Sintering temperatures;    Superconducting phase;    Superconducting properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012063/pdf
DOI  :  10.1088/1742-6596/871/1/012063

来源: IOP

【 摘 要 】

FeSe Superconducting films were fabricated with a chemical transport deposition process. During the fabrication process, Fe foils were adopted as substrates and Se powders were put at one end of the tube furnace. During the heating process, Se powders were vaporized, and vaporized atoms were carried by Ar flow and deposited on the Fe substrates. With a heat treatment process under proper temperature, superconducting tetragonal β-FeSe phase can be obtained. The effects of key parameters, including the sintering temperatures and the distances between Fe substrates and Se source on the phase composition and morphology of the obtained films were systematically investigated. The superconducting transition temperature of 7.8 K was obtained on the optimized film. By further optimization of the heat treatment process, it is promising to fabricate FeSe films with higher superconducting phase content and better superconducting properties.