Relationship between crystallization process and superconducting properties of YBCO films by TFA–MOD method using starting solution with various compositions

Nakaoka, K.; Yoshizumi, M.; Izumi, Teruo; Yamada, Yutaka; Shiohara, Yuh

doi:10.1016/j.physc.2010.05.084

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…Reducing the fluorine content of the starting MO precursors in the TFA process is an issue of great interest that has been widely investigated recently by several authors. The purpose of these investigations is to reduce the detrimental environmental effects of fluorine compounds, to enhance the performances of the films at large thicknesses [64][65][66][67] or to shorten the pyrolysis process.…”

Section: Solution Preparation and Depositionmentioning

confidence: 99%

Growth, nanostructure and vortex pinning in superconducting YBa₂Cu₃O₇thin films based on trifluoroacetate solutions

Obradors¹,

Puig²,

Ricart³

et al. 2012

Supercond. Sci. Technol.

172

235

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Chemical solution deposition (CSD) is a very competitive technique to obtain epitaxial films and multilayers of high quality with controlled nanostructures. Based on the strong attractiveness from the cost point of view, the production of long length coated conductors based on the CSD approach is being extensively developed. The trifluoroacetate route (TFA) is the most widely used route to achieve epitaxial YBa 2 Cu 3 O 7 (YBCO) layers with high critical currents, however a deep understanding of all the individual consecutive processing steps, as well as their mutual influence and relationship, is required to achieve superconducting materials with high performance. In this work, we review advances in the knowledge of all the steps relevant to the preparation of YBCO thin films based on TFA precursors as a CSD methodology: solution preparation and deposition, pyrolysis processes, intermediate phase evolution, nucleation and growth phenomena, microstructural evolution and its influence on percolating supercurrents, as well as vortex pinning by natural existing defects. Finally, we discuss the open issues still existing in the TFA approach, particularly that of film nanostructuration, and we provide a future outlook for this outstanding methodology.

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Section: Solution Preparation and Depositionmentioning

confidence: 99%

Growth, nanostructure and vortex pinning in superconducting YBa₂Cu₃O₇thin films based on trifluoroacetate solutions

Obradors¹,

Puig²,

Ricart³

et al. 2012

Supercond. Sci. Technol.

172

235

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“…Very different strategies have been followed to increase the REBCO film thickness under these two broad groups of CCs, mainly because the degree of understanding and control of nucleation and growth of epitaxial layers greatly differs. In both groups of techniques YBCO films of several microns have been demonstrated with I c values at 77 K and self-field in excess of 700 A/cm-w [14,20,21,[23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…Inkjet printing (IJP) has also been shown to be an appealing long length approach [43][44][45]. All these processes have been primarily used to obtain thin films (t500 nm) and little effort in growing thick films (t800 nm) has been reported [6,22,24]. In all cases, a single deposition is made to prepare thin films, while thick films usually require multideposition, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Unraveling how nucleation and growth occurs in YBCO thick films based on the BaF 2 intermediate still remains an open issue because additional phenomena need to be taken into account. A remarkable effort has been made related to films where BaF 2 deposition was undertaken through EV [22,26,27,51,56,57], however, thick films prepared by CSD have not been analyzed as much [24,29,32,58].…”

Section: Introductionmentioning

confidence: 99%

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Growth of all-chemical high critical current YBa₂Cu₃O_7−δ thick films and coated conductors

Pop

Villarejo

Pino

et al. 2018

Supercond. Sci. Technol.

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The achievement of high critical currents in ‘all-chemical’ YBa2Cu3O7−δ thick films from low cost and versatile chemical solution deposition (CSD) methodology is still an open issue. Here we report a study of the nucleation and growth conditions to achieve YBa2Cu3O7−δ films in excess of 1 micron using single pass inkjet printing or multideposition of low-fluorine metalorganic precursors. Growth conditions of thick YBa2Cu3O7−δ layers are first investigated on LaAlO3, where there is no interfacial chemical reactivity. The second architecture investigated is an ‘all-chemical’ CSDCe0.9Zr0.1O2(CZO)/YSZ multilayer on single crystal substrates which serves as model system for coated conductors. Finally, the ‘all-chemical’ coated conductor architecture CSDYBa2Cu3O7/CSDCZO/ABADYSZ/stainless steel, where ABAD stands for alternating beam assisted deposition, is investigated. The nucleation conditions of YBa2Cu3O7−δ films on top of CΖΟ cap layers have been selected to minimize the formation of the BaCeO3 phase at the interface. We demonstrate that by combining the use of Ag additives in the starting YBCO solution and processing conditions leading to low supersaturation (high water pressure and low temperature) we can achieve ∼1 μm thick YBa2Cu3O7−δ films and coated conductors with high critical currents of = 390 and 100 A/cm-w, respectively, at 77 K and self-field. The achieved control of the interfacial reactivity with CeO2 cap layers opens a route for further increasing film thickness and critical currents in ‘all-chemical’ YBa2Cu3O7−δ coated conductors.

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“…Then, we tried to produce high-I c YBCO films from the Ba-deficient coating solution since the YBCO films from the Ba-deficient coating solution were reported to exhibit higher J c values compared with that from the stoichiometric one [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

Lee¹,

Shin²,

Yoo³

2011

Progress in Superconductivity and Cryogenics

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Relationship between crystallization process and superconducting properties of YBCO films by TFA–MOD method using starting solution with various compositions

Cited by 4 publications

References 9 publications

Growth, nanostructure and vortex pinning in superconducting YBa₂Cu₃O₇thin films based on trifluoroacetate solutions

Growth, nanostructure and vortex pinning in superconducting YBa₂Cu₃O₇thin films based on trifluoroacetate solutions

Growth of all-chemical high critical current YBa₂Cu₃O_7−δ thick films and coated conductors

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

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Relationship between crystallization process and superconducting properties of YBCO films by TFA–MOD method using starting solution with various compositions

Cited by 4 publications

References 9 publications

Growth, nanostructure and vortex pinning in superconducting YBa2Cu3O7thin films based on trifluoroacetate solutions

Growth, nanostructure and vortex pinning in superconducting YBa2Cu3O7thin films based on trifluoroacetate solutions

Growth of all-chemical high critical current YBa2Cu3O7−δ thick films and coated conductors

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

Contact Info

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Resources

About

Growth, nanostructure and vortex pinning in superconducting YBa₂Cu₃O₇thin films based on trifluoroacetate solutions

Growth, nanostructure and vortex pinning in superconducting YBa₂Cu₃O₇thin films based on trifluoroacetate solutions

Growth of all-chemical high critical current YBa₂Cu₃O_7−δ thick films and coated conductors