Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints

Abstract Aiming to introduce NbTi alloy superconducting joints for REBa2Cu3O7−δ (REBCO, RE: rare-earth element) superconducting wires, NbTi alloy thin films were deposited at room temperature on SrTiO3 (STO) (001) single-crystal substrates, which have a high lattice matching with REBCO (001). The st...

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Autores principales:	Yuhei Shimizu, Kazuhiko Tonooka, Yoshiyuki Yoshida, Mitsuho Furuse, Hiroshi Takashima
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Single Crystal Substrates NbTi Alloy Scanning Transmission Electron Microscopy (STEM) Cross-sectional STEM Image Full Widths At Half Maximum (FWHM) Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c5a9f887bb814c9d94431ce21622ca09
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spelling	oai:doaj.org-article:c5a9f887bb814c9d94431ce21622ca092021-12-02T15:08:25ZGrowth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints10.1038/s41598-018-33442-72045-2322https://doaj.org/article/c5a9f887bb814c9d94431ce21622ca092018-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-33442-7https://doaj.org/toc/2045-2322Abstract Aiming to introduce NbTi alloy superconducting joints for REBa2Cu3O7−δ (REBCO, RE: rare-earth element) superconducting wires, NbTi alloy thin films were deposited at room temperature on SrTiO3 (STO) (001) single-crystal substrates, which have a high lattice matching with REBCO (001). The strain, crystallinity, surface morphology, and superconducting property of the films with various thicknesses were investigated. The NbTi films grew in the orientation with (110)NbTi//(001)STO:[001]NbTi and [11–0] NbTi//[100]STO; that is, the NbTi lattices had two directions in the (110) of NbTi. The strain decreased and the crystallinity improved as the film thickness increased. The films were found to crystallize immediately at the interface between the films and substrates by cross-sectional scanning transmission electron microscopy. The flat surfaces of the films have mesh-like morphologies due to the growth of elongated NbTi grains along the [100] and [010] of the STO, reflecting the in-plane two directions of the NbTi lattices. The superconducting transition temperature of the films increased with improvement in the crystallinity of the films. The preparation of superconducting NbTi alloy thin films with sufficient crystallinity at room temperature suggested the possibility of forming the films on REBCO and the applicability of the films as superconducting joints.Yuhei ShimizuKazuhiko TonookaYoshiyuki YoshidaMitsuho FuruseHiroshi TakashimaNature PortfolioarticleSingle Crystal SubstratesNbTi AlloyScanning Transmission Electron Microscopy (STEM)Cross-sectional STEM ImageFull Widths At Half Maximum (FWHM)MedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-6 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Single Crystal Substrates NbTi Alloy Scanning Transmission Electron Microscopy (STEM) Cross-sectional STEM Image Full Widths At Half Maximum (FWHM) Medicine R Science Q
spellingShingle	Single Crystal Substrates NbTi Alloy Scanning Transmission Electron Microscopy (STEM) Cross-sectional STEM Image Full Widths At Half Maximum (FWHM) Medicine R Science Q Yuhei Shimizu Kazuhiko Tonooka Yoshiyuki Yoshida Mitsuho Furuse Hiroshi Takashima Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
description	Abstract Aiming to introduce NbTi alloy superconducting joints for REBa2Cu3O7−δ (REBCO, RE: rare-earth element) superconducting wires, NbTi alloy thin films were deposited at room temperature on SrTiO3 (STO) (001) single-crystal substrates, which have a high lattice matching with REBCO (001). The strain, crystallinity, surface morphology, and superconducting property of the films with various thicknesses were investigated. The NbTi films grew in the orientation with (110)NbTi//(001)STO:[001]NbTi and [11–0] NbTi//[100]STO; that is, the NbTi lattices had two directions in the (110) of NbTi. The strain decreased and the crystallinity improved as the film thickness increased. The films were found to crystallize immediately at the interface between the films and substrates by cross-sectional scanning transmission electron microscopy. The flat surfaces of the films have mesh-like morphologies due to the growth of elongated NbTi grains along the [100] and [010] of the STO, reflecting the in-plane two directions of the NbTi lattices. The superconducting transition temperature of the films increased with improvement in the crystallinity of the films. The preparation of superconducting NbTi alloy thin films with sufficient crystallinity at room temperature suggested the possibility of forming the films on REBCO and the applicability of the films as superconducting joints.
format	article
author	Yuhei Shimizu Kazuhiko Tonooka Yoshiyuki Yoshida Mitsuho Furuse Hiroshi Takashima
author_facet	Yuhei Shimizu Kazuhiko Tonooka Yoshiyuki Yoshida Mitsuho Furuse Hiroshi Takashima
author_sort	Yuhei Shimizu
title	Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
title_short	Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
title_full	Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
title_fullStr	Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
title_full_unstemmed	Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
title_sort	growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/c5a9f887bb814c9d94431ce21622ca09
work_keys_str_mv	AT yuheishimizu growthandsuperconductivityofniobiumtitaniumalloythinfilmsonstrontiumtitanate001singlecrystalsubstratesforsuperconductingjoints AT kazuhikotonooka growthandsuperconductivityofniobiumtitaniumalloythinfilmsonstrontiumtitanate001singlecrystalsubstratesforsuperconductingjoints AT yoshiyukiyoshida growthandsuperconductivityofniobiumtitaniumalloythinfilmsonstrontiumtitanate001singlecrystalsubstratesforsuperconductingjoints AT mitsuhofuruse growthandsuperconductivityofniobiumtitaniumalloythinfilmsonstrontiumtitanate001singlecrystalsubstratesforsuperconductingjoints AT hiroshitakashima growthandsuperconductivityofniobiumtitaniumalloythinfilmsonstrontiumtitanate001singlecrystalsubstratesforsuperconductingjoints
_version_	1718388148267909120

Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints

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