Investigations of thick YBCO coated conductor with high critical current using IBAD-PLD method

Ibi, A.; Iwai, Hiroyuki; Takahashi, Kazuhiro; Muroga, T.; Miyata, S.; Watanabe, T.; Yamada, Yutaka; Shiohara, Yuh

doi:10.1016/j.physc.2005.02.083

Cited by 59 publications

(30 citation statements)

References 7 publications

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“…Extensive optimization of the REBCO-BZO system has been done using MOCVD, in terms of dopant concentration, film microstructure, growth conditions and composition to achieve high in-field performance 13,16–18 . However, common to most REBCO film growth techniques, J c was typically found to strongly deteriorate with thickness 19–21 .…”

Section: Introductionmentioning

confidence: 99%

Over 15 MA/cm2 of critical current density in 4.8 µm thick, Zr-doped (Gd,Y)Ba2Cu3Ox superconductor at 30 K, 3T

Majkic

Pratap

et al. 2018

Sci Rep

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An Advanced MOCVD (A-MOCVD) reactor was used to deposit 4.8 µm thick (Gd,Y)BaCuO tapes with 15 mol% Zr addition in a single pass. A record-high critical current density (Jc) of 15.11 MA/cm2 has been measured over a bridge at 30 K, 3T, corresponding to an equivalent (Ic) value of 8705 A/12 mm width. This corresponds to a lift factor in critical current of ~11 which is the highest ever reported to the best of author’s knowledge. The measured critical current densities at 3T (B||c) and 30, 40 and 50 K, respectively, are 15.11, 9.70 and 6.26 MA/cm2, corresponding to equivalent Ic values of 8705, 5586 and 3606 A/12 mm and engineering current densities (Je) of 7068, 4535 and 2928 A/mm2. The engineering current density (Je) at 40 K, 3T is 7 times higher than that of the commercial HTS tapes available with 7.5 mol% Zr addition. Such record-high performance in thick films (>1 µm) is a clear demonstration that growing thick REBCO films with high critical current density (Jc) is possible, contrary to the usual findings of strong Jc degradation with film thickness. This achievement was possible due to a combination of strong temperature control and uniform laminar flow achieved in the A-MOCVD system, coupled with optimization of BaZrO3 nanorod growth parameters.

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Section: Introductionmentioning

confidence: 99%

Over 15 MA/cm2 of critical current density in 4.8 µm thick, Zr-doped (Gd,Y)Ba2Cu3Ox superconductor at 30 K, 3T

Majkic

Pratap

et al. 2018

Sci Rep

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“…The GdBCO layer was deposited by using MPMT-PLD method on this substrate with a mixed target of GdBCO matrix including 5 mol% ZrO 2 . A multi-layer deposition method [12][13][14] was applied for deposition of the GdBCO layer. This deposition method was carried out at difference setting temperatures in each deposition run to keep the GdBCO layer surface temperature constant with increase in the GdBCO layer thickness.…”

Section: Methodsmentioning

confidence: 99%

Development of long REBCO coated conductors with artificial pinning centers by using MPMT–PLD method

Ibi

Miyata

Kuriki

et al. 2008

Physica C: Superconductivity

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“…To obtain coated conductor with several hundreds of amperes, YBCO films with J c over 1MA/cm 2 should have a thickness of several micrometers [8][9][10]. Unfortunately, a so-called ''thickness effect'' phenomenon that J c drops rapidly with the increase in film thickness could not be avoided no matter which kind of technique is adopted [1,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ultralow-fluorine sol–gel deposition of thick YBCO multilayer films

Bian

Chen

et al. 2015

J Sol-Gel Sci Technol

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Three kinds of low-fluorine YB 2 Cu 3 O 7-x (YBCO) starting sols with F/Ba = 6, 4 and 2 were applied to fabricate multilayer YBCO films on LaAlO 3 substrates by multi-coating technique. Influence of the fluorine content in the sols and the thickness of single-coated layer on the properties of multilayer YBCO films was discussed in detail. The critical current density (J c ) of multilayer YBCO films derived from F/Ba = 6 and 4 sols dropped sharply with thickness. However, using sol with F/Ba = 2, the J c of multilayer films decreased slowly with thickness. Moreover, the thinner the single-coated film, the less the amount of a-axis-oriented grains inside the multilayer films, resulting in the improvement in J c of the final thick films. Through multi-coating technique, YBCO films as thick as 1.1-1.2 lm were prepared. The J c of the optimized thick YBCO films reached a high value of 4.23MA/cm 2 at 77 K, 0T. Graphical Abstract Compared with the YBCO films derived from other low-fluorine sols, the YBCO films prepared using the ultralow-fluorine sol with mole ratio of F/Ba = 2 show the higher superconducting current transportation ability. Using this solution, the ''thickness effect'' of multilayer thick YBCO films is degraded obviously. Moreover, lowering the thickness of every layer film through controlling the withdrawal speed can also suppress the formation of a-axis grains, thus enhancing the critical current density of final thick YBCO films.

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Investigations of thick YBCO coated conductor with high critical current using IBAD-PLD method

Cited by 59 publications

References 7 publications

Over 15 MA/cm2 of critical current density in 4.8 µm thick, Zr-doped (Gd,Y)Ba2Cu3Ox superconductor at 30 K, 3T

Over 15 MA/cm2 of critical current density in 4.8 µm thick, Zr-doped (Gd,Y)Ba2Cu3Ox superconductor at 30 K, 3T

Development of long REBCO coated conductors with artificial pinning centers by using MPMT–PLD method

Ultralow-fluorine sol–gel deposition of thick YBCO multilayer films

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