Pinning Characteristics of Zr and Hf- Added REBCO Coated Conductors Made by Advanced MOCVD in Low-to-High Magnetic Fields

Galstyan, Eduard; Pratap, Rudra; Paidpilli, Mahesh; Majkic, Goran; Selvamanickam, V.

doi:10.1109/tasc.2021.3061904

Cited by 11 publications

(4 citation statements)

References 39 publications

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“…The differences in the BZO nanorod morphology and overall microstructure in films with different Ba content manifests themselves in the flux pinning efficacy in high magnetic fields at 4.2 K. As shown in figure 2, the magnetization J c of 4.2 µm thick film REBCO tapes with 15% Zr and 15% Hf addition increases with increasing Ba content up to a certain level [44]. It is found that the lift factor in J c continues to increase with higher Ba content to levels as high as 45 at 4.2 K, 13 T, but because of degradation in REBCO film texture and excessive strain in the film, the J c itself peaks at an intermediate level of Ba content.…”

Section: Low Field High-temperature Rebcomentioning

confidence: 97%

Development of RE-Ba-Cu-O superconductors in the U.S. for ultra-high field magnets

Paidpilli

Selvamanickam

2022

Supercond. Sci. Technol.

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High-temperature superconductors (HTS) make it possible to achieve magnetic fields beyond the 23.5 T limit of low-temperature superconductors (LTS). For higher energy density, high-performance HTS with Je > 1000 A/mm2 enable reduction in coil winding length and a smaller magnet size. Among HTS, REBa2Cu3O7-δ (REBCO, RE = rare earth) exhibits excellent mechanical properties and superior performance over a wide range of temperatures and magnetic fields. REBCO tapes can be converted to various formats, including round wires. The state-of-the-art REBCO superconductors for ultra-high field magnets, including cable/wire architectures, are reviewed. R&D needs to address remaining challenges with REBCO superconductors for ultra-high magnetic field applications are discussed.

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Section: Low Field High-temperature Rebcomentioning

confidence: 97%

Development of RE-Ba-Cu-O superconductors in the U.S. for ultra-high field magnets

Paidpilli

Selvamanickam

2022

Supercond. Sci. Technol.

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“…It is common to introduce BaMO 3 (BMO, M = Zr, Hf) in the form of self-assembled nanorods, primarily oriented along the c-axis of the REBCO thin film, to reduce the magnetic field anisotropy and improve the in-field performance [8][9][10][11][12]. In recent years, the effectiveness of BMO as artificial pinning centers for enhancing in-field performance has been widely studied from fundamental and processing aspects [11][12][13][14][15]. REBCO tapes produced using Advanced metal organic chemical vapor deposition (A-MOCVD) with 15% Hf addition exhibited an engineering current density (J e ) of ∼4600 A mm −2 (based on 0.1 mm-thick tape) at 4.2 K, 20 T [16].…”

Section: Introductionmentioning

confidence: 99%

High-current, double-sided REBCO tapes by advanced MOCVD

Paidpilli

Sandra

Sarangi

et al. 2023

Supercond. Sci. Technol.

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An approach to fabricate double-sided, high-current RE-Ba2Cu3O7-δ(REBCO) tapes for use in ultrahigh-field superconducting magnets operating at and above 20 T is demonstrated. In this work, we modified our advanced metal organic chemical vapor deposition (A-MOCVD) reactor to deposit REBCO films on each side of a double-sided buffer substrate in a single pass. The composition, thickness and critical current (Ic) of 1-µm-thick REBCO films on each side of the double-sided tapes are compared. Double-sided REBCO tape with 2-µm-thick films on each side showed self-field critical current density (Jc) over 2.6 MA/cm2 at 77 K and 0 T. 15%-Zr-added double-sided REBCO tape showed Ic over 530 A/4mm at 20 K, 20 T.

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“…The c-axis-aligned one-dimensional artificial pinning centers (1D-APCs), such as nanorods of BaZrO 3 (BZO), BaSnO 3 (BSO), BaHfO 3 (BHO), and YBa 2 (Nb/Ta)O 6, in high temperature superconducting (HTS) REBaCu 3 O 7-x (RE = Y, Gd, Sm) films provide strong correlated pinning at B//c-axis [1][2][3][4][5][6][7][8][9][10]. However, the strain field originated from the lattice mismatch at the 1D-APC/REBCO interface could result in reduced superconducting transition temperature (T c ) and critical current density (J c ) at temperatures close to T c [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The benefit of Ca in improving pinning of BaZrO₃-Y₂O₃doubly-doped YBa₂Cu₃O_7-x/Ca_0.3Y_0.7Ba₂Cu₃O_7-xmultilayer nanocomposite films

Panth

Ogunjimi

Sebastian

et al. 2023

Mater. Res. Express

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This work examines the pinning enhancement in BaZrO3 (BZO) +Y2O3 doubly-doped (DD) YBa2Cu3O7 (YBCO) nanocomposite multilayer (DD-ML) films. The film consists of two 10 nm thin Ca0.3Y0.7Ba2Cu3O7-x (CaY-123) spacers stacking alternatively with three BZO+Y2O3/YBCO layers of 50 nm each in thickness that contain 3 vol.% of Y2O3 and BZO doping in the range of 2-6 vol.%. Enhanced magnetic vortex pinning and improved pinning isotropy with respect to the orientation of magnetic field (B) have been achieved in the DD-ML samples at lower BZO doping as compared to that in the single-layer counterparts (DD-SL) without the CaY-123 spacers. For example, the pinning force density (Fp) of ~58 GNm-3 in 2 vol.% of DD-ML film is ~110% higher than in 2 vol.% of DD-SL at 65 K and B//c-axis, which is attributed to the improved pinning efficiency by c-axis aligned BZO nanorods through diffusion of Calcium (Ca) along the tensile-strained channels at BZO nanorods/YBCO interface for improvement of the interface microstructure and hence pinning efficiency of BZO nanorods. An additional benefit is in the considerably improved Jc(θ) and reduced Jc anisotropy in the former over the entire range of the B orientations. However, at higher BZO doping, the BZO nanorods become segmented and misoriented, which may change the Ca diffusion pathways and reduce the benefit of Ca in improving the pinning efficiency of BZO nanorods.

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Pinning Characteristics of Zr and Hf- Added REBCO Coated Conductors Made by Advanced MOCVD in Low-to-High Magnetic Fields

Cited by 11 publications

References 39 publications

Development of RE-Ba-Cu-O superconductors in the U.S. for ultra-high field magnets

Development of RE-Ba-Cu-O superconductors in the U.S. for ultra-high field magnets

High-current, double-sided REBCO tapes by advanced MOCVD

The benefit of Ca in improving pinning of BaZrO₃-Y₂O₃doubly-doped YBa₂Cu₃O_7-x/Ca_0.3Y_0.7Ba₂Cu₃O_7-xmultilayer nanocomposite films

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Pinning Characteristics of Zr and Hf- Added REBCO Coated Conductors Made by Advanced MOCVD in Low-to-High Magnetic Fields

Cited by 11 publications

References 39 publications

Development of RE-Ba-Cu-O superconductors in the U.S. for ultra-high field magnets

Development of RE-Ba-Cu-O superconductors in the U.S. for ultra-high field magnets

High-current, double-sided REBCO tapes by advanced MOCVD

The benefit of Ca in improving pinning of BaZrO3-Y2O3doubly-doped YBa2Cu3O7-x/Ca0.3Y0.7Ba2Cu3O7-xmultilayer nanocomposite films

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The benefit of Ca in improving pinning of BaZrO₃-Y₂O₃doubly-doped YBa₂Cu₃O_7-x/Ca_0.3Y_0.7Ba₂Cu₃O_7-xmultilayer nanocomposite films