Journal Article

FZJ-2023-01583

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tuning Epitaxial Growth of Nb on MgO(100)

Guasco, L. (Corresponding author)MLZ*Extern* ; Huaman, L. M.MLZ*FZJ* ; Khaydukov, Y. N.Extern*MLZ* ; Keller, T.Extern*MLZ* ; Pütter, S. (Corresponding author)FZJ*

2023
Wiley-VCH GmbH Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/34544  doi:10.1002/apxr.202200122

Abstract: Niobium thin films are central to many applications, such as superconducting radio-frequency cavities and superconducting qubits, due to its relatively high superconducting temperature and easiness to form heterostructures. However, literature on epitaxial growth of Nb on one of the most commonly used substrates, that is MgO, reports contradicting results. In the present parametric study, a coherent picture of how the crystalline orientation and the film morphology depend on the growth parameters is presented. The effects of growth parameters such as growth temperature, growth rate, deposition technique, and surface quality on the transport properties of the superconductor are discussed. In light of the new findings, an overview on previously published results and proposed nucleation and growth mechanisms is also given.

Keyword(s): Magnetic Materials (1st) ; Condensed Matter Physics (2nd)

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Contributing Institute(s):

1. JCNS-4 (JCNS-4)
2. JCNS-FRM-II (JCNS-FRM-II)
3. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. MBE-MLZ: Molecular Beam Epitaxy at MLZ
2. NREX: Neutron reflectometer with X-ray option (NL1)

Appears in the scientific report 2023

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