Approaches in controllable generation of artificial pinning center in REBa2Cu3Oy-coated conductor for high-flux pinning

Yoshida, Y.; Miura, Shun; Tsuchiya, Yuji; Awaji, Satoshi; Matsumoto, Kaname; Ichinose, Ataru

doi:10.1088/1361-6668/aa8236

Cited by 32 publications

(22 citation statements)

References 33 publications

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“…Furthermore, significant YBCO lattice distortions are largely absent in the ML. This distortion in the YBCO lattice of SL film, which have been reported previously [32][33][34][35][36], arises from the strain around the BZO/YBCO interface as a result of the ~ 7.7% BZO/YBCO lattice mismatch. The absence of these defects in the ML may be attributed to the stacking faults formed in the Ca rich region (enclosed in ellipse in Figure 1b) of the ML film.…”

Section: Resultssupporting

confidence: 65%

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Ogunjimi

Sebastian

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Microstructural analysis of the BaZrO3 (BZO)/YBa2Cu3O7 (YBCO) interface has revealed a highly defective and oxygen deficient 2-3 nm thick YBCO column surrounding the BZO one-dimensional artificial pinning centers (1D-APCs). The resulting semi-coherent interface is the consequence of the ∼7.7% BZO/YBCO lattice mismatch and is responsible for the low pinning efficiency of BZO 1D-APCs. Herein, we report an interface engineering approach of dynamic Ca/Cu replacement on YBCO lattice to reduce/eliminate the BZO/YBCO lattice mismatch for improved pinning at a wide angular range of the magnetic field orientation. The Ca/Cu replacement induces a local elongation of the YBCO c-lattice near the BZO/YBCO interface, thereby ensuring a reduction in the BZO/YBCO lattice mismatch to ∼1.4% and a coherent BZO/YBCO interface. This has resulted in enhanced pinning at B//c-axis and a broad angular range of B-field orientation. For example, the 6 vol.% BZO/YBCO film with interface engineering exhibits F p ∼158 GN/m3 at 65 K and B//c-axis, which is 440% higher than the ∼36.1 GN/m3 for the reference 6% BZO/YBCO sample, and enhanced Jc and F p in a wide angular range up to ∼ 80°. This result illustrates a facile scheme for engineering 1D-APC/YBCO interface to resume the pristine pinning efficiency of the 1D-APCs.

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Section: Resultssupporting

confidence: 65%

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Ogunjimi

Sebastian

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…For pn-nanocomposite-BZO, it is shown a fairly constant (5 K) ~40 MA/cm 2 up to 20 mol%, being the highest nanoparticle loading reported in epitaxial pn-YBCO nanocomposite with high critical current. This molar concentration approaches the optimal volume of secondary phases in PLD or MOCVD nanocomposite films having a nanorod structure 52–54 . Then, at 25 mol% loads the starts to decrease being in agreement with the texture degradation identified in the out-of-plane texture analysis above.…”

Section: Resultsmentioning

confidence: 93%

Control of nanostructure and pinning properties in solution deposited YBa2Cu3O7−x nanocomposites with preformed perovskite nanoparticles

Coll

Mundet

et al. 2019

Sci Rep

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Solution deposited YBa 2 Cu 3 O 7−x (YBCO) nanocomposites with preformed nanoparticles represent a promising cost-effective approach for superior critical current properties under applied magnetic fields. Nonetheless, the majority of YBCO nanocomposites with high nanoparticle loads (>20%) suffer from nanoparticle coalescence and degraded superconducting properties. Here, we study the influence of nanoparticle concentration (0–25% mol), size (5 nm–10 nm) and composition (BaHfO 3 , BaZrO 3 ) on the generation of structural defects in the epitaxial YBCO matrix, key parameter for vortex pinning. We demonstrate that flash-heated superconducting nanocomposites with 20 mol% preformed BaHfO 3 or BaZrO 3 perovskite secondary phases feature discrete and small (7 nm) nanoparticles and high density of YBa 2 Cu 4 O 8 (Y248) intergrowths. We identify a synergy between Y248 intergrowth density and small nanoparticles to increase artificial vortex pinning centers. Also, we validate the multideposition process to successfully increase film thickness of epitaxial nanocomposites with competitive critical currents I c at 77 K.

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“…However, the critical currents produced by these naturally occurring defects are not sufficient for most applications. Additional pin sites are typically introduced into the REBCO matrix by tuning precursor chemistry and growth conditions such that non-superconducting precipitates of various sizes and shapes, so-called artificial pinning centers, appear during the growth process that provide strong pinning by so-called artificial pinning centers [18][19][20]. Significant enhancements of Jc have been achieved with the incorporation of RE2O3 [21,22], YBa2Cu3O5 [23], BaZrO3 [24][25][26] nanoparticles.…”

Section: Critical Current In High-temperature Superconductorsmentioning

confidence: 99%

The Quest for High Critical Current in Applied High-Temperature Superconductors

Glatz

Sadovskyy

Welp

et al. 2019

J Supercond Nov Magn

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We present a perspective on a new critical-current-by-design paradigm to tailor and enhance the current-carrying capacity of applied superconductors. Critical current by design is based on large-scale simulations of vortex matter pinning in high-temperature superconductors and has qualitative and quantitative predictive powers to elucidate vortex dynamics under realistic conditions and to propose vortex pinning defects that could enhance the critical current, particularly at high magnetic fields. The simulations are validated with controlled experiments and demonstrate a powerful tool for designing highperformance superconductors for targeted applications.

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Approaches in controllable generation of artificial pinning center in REBa₂Cu₃O_y-coated conductor for high-flux pinning

Cited by 32 publications

References 33 publications

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Control of nanostructure and pinning properties in solution deposited YBa2Cu3O7−x nanocomposites with preformed perovskite nanoparticles

The Quest for High Critical Current in Applied High-Temperature Superconductors

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