Comparative study of Fe(Se,Te) thin films on flexible coated conductor templates and single-crystal substrates

Thomas AA, Shipulin IA, Holleis S, Eisterer M, Nielsch K, Huehne R (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Superconductor Science and Technology

Book Volume: 34

Article Number: 115013

Journal Issue: 11

DOI: 10.1088/1361-6668/ac2557

Abstract

In this paper, we compare epitaxial Fe(Se,Te) thin films grown by pulsed laser deposition on CaF2, SrTiO3, MgO single crystals as well as on different metallic templates having a CeO2 based top surface. In particular, we performed a detailed structural and superconducting analysis. X-ray diffraction studies showed highly textured films on all templates. The superconducting transition temperatures are between 21 K and 14 K for Fe(Se,Te) films on CaF2 and on MgO single-crystal substrates, respectively, whereas films on the metal templates show T c values up to 18 K. The critical current density (J c) was determined from magnetization loops in fields up to 7 T. Calculations in the framework of the extended critical state model showed J c values over 2 MA cm-2 and 0.9 MA cm-2 at 5 K in self-field on single-crystal substrates and metal templates substrates, respectively. Detailed transmission electron microscopy studies reveal smooth layers on all templates. Whereas small defects were found in films on single crystals, pronounced grain boundaries with higher misorientation angle were visible in the layers on metallic templates.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Technische Universität Wien / Vienna University of Technology AT Austria (AT)

How to cite

APA:

Thomas, A.A., Shipulin, I.A., Holleis, S., Eisterer, M., Nielsch, K., & Huehne, R. (2021). Comparative study of Fe(Se,Te) thin films on flexible coated conductor templates and single-crystal substrates. Superconductor Science and Technology, 34(11). https://doi.org/10.1088/1361-6668/ac2557

MLA:

Thomas, Aleena Anna, et al. "Comparative study of Fe(Se,Te) thin films on flexible coated conductor templates and single-crystal substrates." Superconductor Science and Technology 34.11 (2021).

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