New insight into strain and composition of BaZrO<sub>3</sub> nanorods in REBCO superconductor

Majkic, Goran; Jeong, Jong Seok; Yun, Hwanhui; Hernandez, Francisco C. Robles; Galstyan, Eduard; Pratap, Rudra; Cheng, Huikai; Stokes, Adam; Mkhoyan, K. Andre; Selvamanickam, V.

doi:10.1088/1361-6668/ac23ba

Cited by 8 publications

(13 citation statements)

References 91 publications

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“…This can be attributed to the fact that the nanorods are not exclusively composed of BZO, but they also contain distorted YBCO or other compounds. The phenomenon also explains the observed difference between the BZO content and the nanorod density. ,, In this case, the observed results would coincide with the experimental observations in the sense that the YBCO + x %BZO can be concluded to grow better on the vicinal substrate.…”

Section: Resultsmentioning

confidence: 99%

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Controlled BZO Nanorod Growth and Improved Flux Pinning in YBCO Films Grown on Vicinal STO Substrates

Aye,

Rivasto,

Rijckaert

et al. 2023

Crystal Growth & Design

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The present study systematically investigates the impact of strain-induced defects on the anisotropy of the critical current density across wide temperature and magnetic field ranges. We focus on 0−10 wt % BaZrO 3 (BZO)-doped YBa 2 Cu 3 O 7−x (YBCO) thin films that are deposited on SrTiO 3 substrates with a 5°surface miscut. Our findings highlight the crucial role played by these vicinal substrates in governing the growth of BZO nanorods within the YBCO films. Interestingly, we observe that the miscutinduced surface step-edge terraces serve as preferred nucleation sites for BZO, resulting in controlled nanorod growth and a significant enhancement in both the self-field and in-field critical current densities. Furthermore, we note that the optimal BZO content for effective flux pinning varies considerably depending on the applied temperature, magnetic field, and its orientation. These findings hold significant implications for the design and development of high-performance superconducting materials. The primary objective in such endeavors is to construct an optimal flux pinning structure that can achieve a high critical current density at relatively high magnetic fields.

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Section: Resultsmentioning

confidence: 99%

“…The phenomenon also explains the observed difference between the BZO content and the nanorod density. 10,13,51 In this case, the observed results would coincide with the experimental observations in the sense that the YBCO + x%BZO can be concluded to grow better on the vicinal substrate.…”

Section: Improved Flux Pinning Bymentioning

confidence: 99%

Controlled BZO Nanorod Growth and Improved Flux Pinning in YBCO Films Grown on Vicinal STO Substrates

Aye,

Rivasto,

Rijckaert

et al. 2023

Crystal Growth & Design

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“…45,46 The BMO nanorods contain Y in the YBCO+BMO films. 25,47,48 It has been reported that the Y 2 O 3 nanoparticle formation depends on the composition of the Nb site in the double perovskite. 49 The involved RE makes the situation more complicated than the film containing only Y.…”

Section: Resultsmentioning

confidence: 99%

“…In the bulk and the pure film, Y 2 O 3 and/or Y 2 BaCuO 5 precipitate depending on the composition and the kinetic factors. , The BMO nanorods contain Y in the YBCO+BMO films. ,, It has been reported that the Y 2 O 3 nanoparticle formation depends on the composition of the Nb site in the double perovskite . The involved RE makes the situation more complicated than the film containing only Y.…”

Section: Discussionmentioning

confidence: 99%

Self-Organized Nanocomposite Structure Controlled by Elemental Site Occupancy to Improve Vortex Pinning in YBa₂Cu₃O₇ Superconducting Films

Horide

Yoshida

Kita

et al. 2022

ACS Appl. Electron. Mater.

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To fabricate high performance YBa 2 Cu 3 O 7 superconducting films and tapes, the critical current density (J c ) should be enhanced and the nanocomposite structure should be very effective in controlling the vortex pinning and J c . Although the nanoscale morphology has been a basic parameter from the early stages of nanorod control, compositional factors should be discussed to effectively control not only the superconducting order parameter distribution but also the thermodynamic parameter relating to crystal growth. In this study, a double perovskite oxide, Ba 2 RENbO 6 (RE = Yb, Lu), was incorporated in YBa 2 Cu 3 O 7 films, where the site occupancy of the RE element is focused to control the nanocomposite structure. The elongated nanorods were formed in both the YBa 2 Cu 3 O 7 +Ba 2 YbNbO 6 and YBa 2 Cu 3 O 7 +Ba 2 LuNbO 6 films. While Lu mainly existed in the nanorods, Yb was observed not only in the nanorods but also in the matrix. As a result, at the fixed nanorod content, while the matching field was larger for the YBa 2 Cu 3 O 7 +Ba 2 YbNbO 6 film, the J c in the high magnetic field was larger for the YBa 2 Cu 3 O 7 +Ba 2 LuNbO 6 film. The angular dependence of J c depended on the RE due to the pinning contribution from the Y-rich nanoparticles. These are unconventional phenomena that are not observed in the YBa 2 Cu 3 O 7 +BaMO 3 (M = Zr, Sn, Hf) films. Thus, the site occupancy of the RE element affects the J c characteristics. The selforganization and the nanocomposite structure can be designed by considering the site occupancy as a variable parameter.

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“…When looking at the volumetric ratio between the YBCO matrix and BZO nanorods in Table , it is obvious that the nanorod density decreased with increasing deposition distance from above 50% at T25 to 32.5% at T45. Because we have earlier demonstrated by XRD that the amount of crystallized BZO is independent of the deposition distance of ≈2% but, on the other hand, the relative Zr ratio measured by EDS is only slightly decreased with increasing deposition distance, being close to the nominal 4% value (Figure ), the difference between the BZO content and nanorod density is more likely related to the composition of the nanorods, where distorted YBCO is also composed in the nanocolumns. − …”

Section: Resultsmentioning

confidence: 71%

Role of the Deposition Distance on Nanorod Growth and Flux Pinning in BaZrO₃-Doped YBa₂Cu₃O_6+x Thin Films: Implications for Superconducting Tapes

Aye

Rivasto

Rijckaert

et al. 2022

ACS Appl. Nano Mater.

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A complex deposition process of high-temperature superconducting (HTS) thin films and coated conductors is usually optimized by concentrating on the crystalline quality of the material, thus getting the best possible critical temperature and self-field properties. However, most of the HTS power applications that are based on coated conductors act at high magnetic fields, and thus an alternative approach focusing on the formation of an optimal network of columnar flux pinning centers is more reasonable. Therefore, we systematically show how a lengthening of the deposition distance produces perfectly aligned and distinctly longer self-assembled BaZrO3 (BZO) nanorods within the YBa2Cu3O6+x (YBCO) matrix. This method unambiguously enhances in-field properties such as pinning force, critical current density, and its isotropy along the YBCO c axis. The experimental results, especially formation of the c peak where the relative length of the nanorod is a key issue, are confirmed by the vortex dynamics simulations. Finally, we present a semiquantitative model governing the formation of nanorods that explains the experimentally observed improved nanorod growth as a function of the deposition distance via the associated variation of the fractional partial pressure between atomic species within the laser plume.

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New insight into strain and composition of BaZrO₃ nanorods in REBCO superconductor

Cited by 8 publications

References 91 publications

Controlled BZO Nanorod Growth and Improved Flux Pinning in YBCO Films Grown on Vicinal STO Substrates

Controlled BZO Nanorod Growth and Improved Flux Pinning in YBCO Films Grown on Vicinal STO Substrates

Self-Organized Nanocomposite Structure Controlled by Elemental Site Occupancy to Improve Vortex Pinning in YBa₂Cu₃O₇ Superconducting Films

Role of the Deposition Distance on Nanorod Growth and Flux Pinning in BaZrO₃-Doped YBa₂Cu₃O_6+x Thin Films: Implications for Superconducting Tapes

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New insight into strain and composition of BaZrO3 nanorods in REBCO superconductor

Cited by 8 publications

References 91 publications

Controlled BZO Nanorod Growth and Improved Flux Pinning in YBCO Films Grown on Vicinal STO Substrates

Controlled BZO Nanorod Growth and Improved Flux Pinning in YBCO Films Grown on Vicinal STO Substrates

Self-Organized Nanocomposite Structure Controlled by Elemental Site Occupancy to Improve Vortex Pinning in YBa2Cu3O7 Superconducting Films

Role of the Deposition Distance on Nanorod Growth and Flux Pinning in BaZrO3-Doped YBa2Cu3O6+x Thin Films: Implications for Superconducting Tapes

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New insight into strain and composition of BaZrO₃ nanorods in REBCO superconductor

Self-Organized Nanocomposite Structure Controlled by Elemental Site Occupancy to Improve Vortex Pinning in YBa₂Cu₃O₇ Superconducting Films

Role of the Deposition Distance on Nanorod Growth and Flux Pinning in BaZrO₃-Doped YBa₂Cu₃O_6+x Thin Films: Implications for Superconducting Tapes