Influence of substrate tilt angle on the incorporation of BaHfO3 in Thick YBa2Cu3O7-δ Films

Sieger M, Pahlke P, Ottolinger R, Stafford BH, Lao M, Meledin A, Bauer M, Eisterer M, Van Tendeloo G, Schultz L, Nielsch K, Huehne R (2017)

Publication Type: Journal article

Publication year: 2017

Journal

IEEE Transactions on Applied Superconductivity Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 27

Article Number: 7752889

Journal Issue: 4

DOI: 10.1109/TASC.2016.2631587

Abstract

High critical current densities can be realized in higherature superconductors, such as YBa2Cu3O7-δ (YBCO), by controlling the density, shape, size, and direction of a secondary phase. Whereas the dependence on the growth rate and deposition temperature has been widely studied as key parameters for nano-engineering the pinning landscape, the vicinal tilt of the substrate surface might have an additional influence. Therefore, we deposited 6 mol% BaHfO3 (BHO)-doped YBCO on SrTiO3 (STO) substrates with vicinal angles α between 0° and 40° to identify the influence of the tilt on the growth mode of BHO. An undisturbed epitaxial growth of the superconductor as well as an epitaxial integration of the BHO phase in the YBCO matrix is observed for all vicinal angles investigated. The critical temperature is constant up to α = 20°, whereas the self-field critical current density at 77 K starts to decrease above 10°. A detailed structural analysis of the film cross sections showed that the growth mode of BHO changes already for a vicinal tilt of 2° from a pure c-axis oriented growth to a layered structure with BHO aligned parallel to the YBCO ab-plane. We identified a strong influence of such a microstructure on the current flow in BHO-doped YBCO films on STO substrates as well as on MgO-based coated conductors prepared by inclined substrate deposition.

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) University of Antwerp / Universiteit Antwerpen BE Belgium (BE) Theva Dünnschichttechnik GmbH DE Germany (DE)

How to cite

APA:

Sieger, M., Pahlke, P., Ottolinger, R., Stafford, B.H., Lao, M., Meledin, A.,... Huehne, R. (2017). Influence of substrate tilt angle on the incorporation of BaHfO3 in Thick YBa2Cu3O7-δ Films. IEEE Transactions on Applied Superconductivity, 27(4). https://doi.org/10.1109/TASC.2016.2631587

MLA:

Sieger, Max, et al. "Influence of substrate tilt angle on the incorporation of BaHfO3 in Thick YBa2Cu3O7-δ Films." IEEE Transactions on Applied Superconductivity 27.4 (2017).

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