Enhanced flux pinning by BaZrO3 and (Gd,Y)2O3 nanostructures in metal organic chemical vapor deposited GdYBCO high temperature superconductor tapes

Chen, Yimin; Selvamanickam, V.; Zhang, Y.; Zuev, Yuri L.; Cantoni, Claudia; Specht, E. D.; Paranthaman, M.; Aytuğ, Tolga; Goyal, A.; Lee, Dominic

doi:10.1063/1.3082037

Cited by 101 publications

(89 citation statements)

References 11 publications

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“…Over the last few years, extensive research has been conducted on BaZrO 3 (BZO) additions. Enhanced flux pinning has been obtained by BZO-incorporated RE123 thin films made by PLD [33], MOCVD [34] and MOD [35]. Depending on deposition technique, the morphology and size of the precipitates and thus the effects on the pinning properties are different.…”

Section: Reactive Co-evaporation (Rce)mentioning

confidence: 99%

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Senatore

Alessandrini

Lucarelli

et al. 2014

Supercond. Sci. Technol.

255

136

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Recent progresses in the second generation REBa 2 Cu 3 O 7 − x (RE123) coated conductor (CC) have paved a way for the development of superconducting solenoids capable of generating fields well above 23.5 T, i.e. the limit of NbTi−Nb 3 Sn-based magnets. However, the RE123 magnet still poses several fundamental and engineering challenges. In this work we review the state-ofthe-art of conductor and magnet technologies. The goal is to illustrate a close synergetic relationship between evolution of high-field magnets and advancement in superconductor technology. The paper is organized in three parts: (1) the basics of RE123 CC fabrication technique, including latest developments to improve conductor performance and production throughput; (2) critical issues and innovative design concepts for the RE123-based magnet; and (3) an overview of noteworthy ongoing magnet projects.

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Section: Reactive Co-evaporation (Rce)mentioning

confidence: 99%

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Senatore

Alessandrini

Lucarelli

et al. 2014

Supercond. Sci. Technol.

255

136

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“…A chemical solution deposition technique was applied to generate a dense array of BZO nanodots randomly oriented and distributed within the YBCO matrix, leading to a quasi-isotropic strong vortex-pinning landscape [4]. Later on, the scalable and economically viable technique of metal-organic chemical vapour deposition (MOCVD) has been successfully employed to fabricate REBCO tapes with enhanced pinning performance through the formation of columnar stacks of BZO nanodots [5][6][7]. However, the measurements described in the literature were almost all performed at relatively high temperatures, about or slightly below liquid nitrogen temperature.…”

Section: Introductionmentioning

confidence: 99%

Properties of recent IBAD–MOCVD coated conductors relevant to their high field, low temperature magnet use

Braccini

Jaroszyński

et al. 2010

Supercond. Sci. Technol.

105

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BaZrO 3 (BZO) nanorods are now incorporated into production IBAD-MOCVD coated conductors. Here we compare several examples of both BZO-free and BZO-containing coated conductors using critical current (I c ) characterizations at 4.2 K over their full angular range up to fields of 31 T. We find that BZO nanorods do not produce any c-axis distortion of the critical current density J c () curve at 4.2 K at any field, but also that pinning is nevertheless strongly enhanced compared to the non-BZO conductors. We also find that the tendency of the ab-plane J c () peak to become cusp-like is moderated by BZO and we define a new figure of merit that may be helpful for magnet design -the OADI (Off-Axis Double I c ), which clearly shows that BZO broadens the abplane peak and thus raises J c 5-30° away from the tape plane, where the most critical approach to I c occurs in many coil designs. We describe some experimental procedures that may make critical current I c tests of these very high current tapes more tractable at 4.2 K, where I c exceeds 1000 A even for 4 mm wide tape with only 1 m thickness of superconductor. A positive conclusion is that BZO is very beneficial for the J c characteristics at 4.2 K, just as it is at higher temperatures, where the correlated c-axis pinning effects of the nanorods are much more obvious.

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“…7,8 REBCO superconducting films with BaZrO 3 (BZO) nanocolumns have long been shown to be very effective for raising the bulk vortex pinning force density F p (= J c × B) at high temperatures. [9][10][11] Recently, their effectiveness has been observed at low temperatures [12][13][14] However, BZO nanorods are often detrimental to the critical temperature T c , and any such T c loss seriously impedes high temperature applications and blurs pinning mechanism study. 11,[15][16][17] Recently, by modifying the metal-organic chemical vapor deposition (MOCVD) growth process, we successfully incorporated a high density of BZO nanorods into REBCO thin films grown on standard commercial ion-beam assisted deposited (IBAD) templates without any T c loss, a high T c ∼ 91 K persisting up to 20 mol.…”

mentioning

confidence: 99%

Strongly enhanced vortex pinning from 4 to 77 K in magnetic fields up to 31 T in 15 mol.% Zr-added (Gd, Y)-Ba-Cu-O superconducting tapes

et al. 2014

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Applications of REBCO coated conductors are now being developed for a very wide range of temperatures and magnetic fields and it is not yet clear whether vortex pinning strategies aimed for high temperature, low field operation are equally valid at lower temperatures and higher fields. A detailed characterization of the superconducting properties of a 15 mol. % Zr-added REBCO thin film made by metal organic chemical vapor deposition, from 4.2 to 77 K under magnetic fields up to 31 T is presented in this article. Even at a such high level of Zr addition, Tc depression has been avoided (Tc = 91 K), while at the same time an exceptionally high irreversibility field Hirr ≈ 14.8 T at 77 K and a remarkably high vortex pinning force density Fp ≈ 1.7 TN/m3 at 4.2 K have been achieved. We ascribe the excellent pinning performance at high temperatures to the high density (equivalent vortex matching field ∼7 T) of self-assembled BZO nanorods, while the low temperature pinning force is enhanced by large additional pinning which we ascribe to strain-induced point defects induced in the REBCO matrix by the BZO nanorods. Our results suggest even more room for further performance enhancement of commercial REBCO coated conductors and point the way to REBCO coil applications at liquid nitrogen temperatures since the critical current density Jc(H//c) characteristic at 77 K are now almost identical to those of fully optimized Nb-Ti at 4 K.

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Enhanced flux pinning by BaZrO3 and (Gd,Y)2O3 nanostructures in metal organic chemical vapor deposited GdYBCO high temperature superconductor tapes

Cited by 101 publications

References 11 publications

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Properties of recent IBAD–MOCVD coated conductors relevant to their high field, low temperature magnet use

Strongly enhanced vortex pinning from 4 to 77 K in magnetic fields up to 31 T in 15 mol.% Zr-added (Gd, Y)-Ba-Cu-O superconducting tapes

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