Dip-coated YBa2Cu3O7−x film by metalorganic deposition using trifluoroacetate

Araki, Takao; Kurosaki, Haruhiko; Yuasa, Toyotaka; Iijima, Y.; Saitoh, Takashi; Yamada, Yasuji; Hirabayashi, I.

doi:10.1016/s0921-4534(02)00916-4

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…(Reprinted by permission from Elsevier Science) [54]. [54,61]. The withdrawal speed dependence shown in figure 23 has been reported [54].…”

Section: Coating Processmentioning

confidence: 87%

“…The gel films were formed on both sides of the withdrawn substrate. When a gel film was withdrawn at 5 mm s −1 from coating solution have a metal concentration of 1.52 mol l −1 , the obtained YBCO film was 200 nm in thickness [54].…”

Section: Preparation Processmentioning

confidence: 99%

“…Various coating processes have been proposed for MOD to obtain long gel films [34,45,54,[60][61][62]. Besides spin-coating and dip-coating itself, most of them are derivatives of dipcoating.…”

Section: Coating Processmentioning

confidence: 99%

“…The withdrawal speed is slow enough to prevent pore formation in the gel film and the system is intrinsically unable to form striations. In addition, the deposition loss of materials from the coating solution is almost 0% [34,54,61]. The dip-coating process has only one disadvantage: it requires a relatively large amount of coating solution to fill up the vessel.…”

Section: Coating Processmentioning

confidence: 99%

“…However, we can easily increase the thickness of YBCO film by dip-coating. (Reprinted by permission from Elsevier Science) [54]. [54,61].…”

Section: Coating Processmentioning

confidence: 99%

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Review of a chemical approach to YBa₂Cu₃O_7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Araki

Hirabayashi

2003

Supercond. Sci. Technol.

266

206

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Large-area, uniform, high critical current density (J c ) YBa 2 Cu 3 O 7−x (YBCO) superconductor films are now routinely obtained by metalorganic deposition using trifluoroacetates (TFA-MOD). This method does not require any expensive vacuum apparatus at any time during the whole process. Thus, TFA-MOD is regarded as one of the most suitable candidates for fabricating a YBCO tape for many high-power applications. This method originated from an electron beam process using BaF 2 developed by Mankiewich et al. Afterwards, Gupta et al reported using TFA-MOD to prepare a similar precursor film. These two ex situ processes used fluorides instead of BaCO 3 to avoid the fatal deterioration in J c , which is caused in the resulting films through metal carboxylic groups. Fluorides not only avoid such deterioration but also lead to perfectly c-axis-oriented epitaxial crystal growth. In conventional metalorganic deposition, nucleation in the precursor film causes random orientation in the resulting film. However, in TFA-MOD, nanocrystallites in the precursor film never cause such disorder. Furthermore, during the firing process of TFA-MOD, water and HF gas diffuse quickly between the film surface and growth front of the YBCO layer. This diffusion never limits the growth rate of YBCO. What distinguishes TFA-MOD from conventional metalorganic deposition? What happens during heat treatment? In this paper, we discuss all the TFA-MOD processes and the peculiar growth scheme of the YBCO layer in TFA-MOD using the model of a quasi-liquid network. In addition, we review the history of TFA-MOD and recent results and discuss the prospects of future applications.

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“…(Reprinted by permission from Elsevier Science) [54]. [54,61]. The withdrawal speed dependence shown in figure 23 has been reported [54].…”

Section: Coating Processmentioning

confidence: 87%

Section: Preparation Processmentioning

confidence: 99%

Section: Coating Processmentioning

confidence: 99%

Section: Coating Processmentioning

confidence: 99%

“…However, we can easily increase the thickness of YBCO film by dip-coating. (Reprinted by permission from Elsevier Science) [54]. [54,61].…”

Section: Coating Processmentioning

confidence: 99%

See 3 more Smart Citations

Review of a chemical approach to YBa₂Cu₃O_7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Araki

Hirabayashi

2003

Supercond. Sci. Technol.

266

206

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Rapid and simple measurement of critical current density in HTS thin films using a permanent magnet method

Saito

Takeishi

Takano³

et al. 2005

Physica C: Superconductivity and its Applications

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A large volume reduction and calcining profile for large-area YBa₂Cu₃O_7 xfilm by metalorganic deposition using trifluoroacetates

Araki¹,

Hirabayashi²,

Niwa³

2003

Supercond. Sci. Technol.

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We have routinely obtained high critical current density (J c ) YBa 2 Cu 3 O 7−x (YBCO) film by metalorganic deposition using trifluoroacetates (TFA-MOD). This method requires a relatively long calcining process of 9-17 h to obtain the optimal J c for 0.15 nm thick film. To apply this method to long wires and tapes, we need to know the thickness dependence of the calcining condition. We found that the optimal time of about 10 h was independent of the final thickness of 150, 180 or 240 nm. Furthermore, the results imply that the chemical reaction during the calcining process was decomposition and that a large-area film could be calcined with the same profile as used for a short one. We successfully calcined seven YBCO films using this profile on 10 × 10 mm LaAlO 3 single crystals in a line. All fired films were 156-188 nm thick and had J c of 5.53-6.73 MA cm −2 (77 K, 0 T) as measured by the four-probe method.

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Dip-coated YBa2Cu3O7−x film by metalorganic deposition using trifluoroacetate

Cited by 5 publications

References 16 publications

Review of a chemical approach to YBa₂Cu₃O_7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Review of a chemical approach to YBa₂Cu₃O_7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Rapid and simple measurement of critical current density in HTS thin films using a permanent magnet method

A large volume reduction and calcining profile for large-area YBa₂Cu₃O_7 xfilm by metalorganic deposition using trifluoroacetates

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Dip-coated YBa2Cu3O7−x film by metalorganic deposition using trifluoroacetate

Cited by 5 publications

References 16 publications

Review of a chemical approach to YBa2Cu3O7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Review of a chemical approach to YBa2Cu3O7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Rapid and simple measurement of critical current density in HTS thin films using a permanent magnet method

A large volume reduction and calcining profile for large-area YBa2Cu3O7 xfilm by metalorganic deposition using trifluoroacetates

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Product

Resources

About

Review of a chemical approach to YBa₂Cu₃O_7 x-coated superconductors—metalorganic deposition using trifluoroacetates

Review of a chemical approach to YBa₂Cu₃O_7 x-coated superconductors—metalorganic deposition using trifluoroacetates

A large volume reduction and calcining profile for large-area YBa₂Cu₃O_7 xfilm by metalorganic deposition using trifluoroacetates