Reduced &lt;inline-formula&gt; 
                     &lt;tex-math notation="LaTeX"&gt;$J_{\mathrm{c}}$&lt;/tex-math&gt;
                  &lt;/inline-formula&gt; Anisotropy and Enhanced In-Field Performance of Thick BaHfO<sub>3</sub>-Doped &lt;inline-formula&gt; 
                     &lt;tex-math notation="LaTeX"&gt;$\text{YBa}_{2}\text{Cu}_{3}\text{O}_{7-\delta}$&lt;/tex-math&gt;
                  &lt;/inline-formula&gt; Films on ABAD-YSZ Templates

Pahlke, Patrick; Lao, Mayraluna; Eisterer, M.; Meledin, Alexander; Tendeloo, Gustaaf Van; Hänisch, Jens; Sieger, Max; Usoskin, A.; Strömer, J. F.; Holzäpfel, B.; Schultz, L.; Hühne, Ruben

doi:10.1109/tasc.2016.2541998

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…Based on their calculations, they defined a phase boundary separating two regions: c-axis aligned columnar nanostructures are preferred energetically on one side of the boundary and not preferred on the other side of the boundary. Their calculations were in good agreement with experimentally obtained results on well-aligned nanocolumns of materials such as BZO [83,150], BSO [94], BHO [103,151,152], and YBNO [97] and spherical nanoparticles of other materials such as Y211 [153] and YO [154,155] which are on the other side of the calculated phase boundary.…”

Section: Factors Determining the Geometry/morphology Of Nanoscale Incsupporting

confidence: 86%

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Jha

Matsumoto

2019

Front. Phys.

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The lossless transmission of direct electrical currents in superconductors is very often regarded as an "energy superhighway" with greatly enhanced efficiency. With the discovery of high temperature superconductors (HTS) in the late eighties, the prospect of using these materials in efficient and advanced technological applications became very prominent. The elevated operating temperatures as compared to low temperature superconductors (LTS), relaxing cooling requirements, and the gradual development of facile synthesis processes raised hopes for a broad breakthrough of superconductor technology. The impact of superconductor technology on the economy and energy sectors is predicted to be huge if these are utilized on a large scale. The development of superconducting tapes with high critical current density (J c) is crucial for their use in transmission cables. Many countries these days are running projects to develop wires from these HTS materials and simultaneously field trials are being conducted to assess the feasibility of this technology. These HTS wires can carry electrical currents more than 100 times larger than their conventional counterparts with minimal loss of energy. The increased efficiency of HTS electric power products may result in greatly reduced carbon emissions compared to those resulting from using the conventional alternatives. In order to use the thin films of YBa 2 Cu 3 O 7−δ (YBCO) and REBCO [RE (rare-earth) = Sm, Gd, Eu etc.], members of the HTS family, for future technological applications, the enhancement of J c over wide range of temperatures and applied magnetic fields is highly desired. The enhancement of J c of YBCO and REBCO films has been successfully demonstrated by employing different techniques which include doping by rare-earth atoms, incorporating nanoscale secondary phase inclusions into the REBCO film matrix, decoration of the substrate surface etc. which generate artificial pinning centers (APCs). In this review, the development of the materials engineering aspect that has been conducted over the last two decades to improve the current carrying capability of HTS thin films is presented. The effect of controlled incorporation of APCs through various methods and techniques on the superconducting properties of YBCO and REBCO thin films is presented, heading toward superior performance of such superconducting thin films.

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Section: Factors Determining the Geometry/morphology Of Nanoscale Incsupporting

confidence: 86%

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Jha

Matsumoto

2019

Front. Phys.

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“…Pinning of quantized magnetic vortices using nanoscale artificial pinning centers (APCs) can lead to significantly enhanced critical current density (J c ) in high temperature superconductors, such as c-axis oriented epitaxial YBa 2 Cu 3 O 7−x (YBCO) thin films and coated conductors [1][2][3]. Among others, selfassembled c-axis aligned one-dimensional (1D) APCs of various oxides, such as BaZrO 3 (BZO) [4][5][6][7][8][9][10], BaSnO 3 [11,12], BaHfO 3 (BHO) [13][14][15][16][17][18][19], and double perovskites such as YBa 2 (Nb/Ta)O 6 and other rare-earth tantalates, niobates and hafnates [20][21][22][23][24] have been reported to provide strong correlated pinning of the magnetic vortices, leading to enhanced critical current density J c when the applied magnetic field B is parallel to the one-dimensional artificial pinning centers (1D-APCs).…”

Section: Introductionmentioning

confidence: 99%

Enabling coherent BaZrO₃nanorods/YBa₂Cu₃O_7−xinterface through dynamic lattice enlargement in vertical epitaxy of BaZrO₃/YBa₂Cu₃O_7−xnanocomposites

Wu¹,

Ogunjimi²,

Sebastian³

et al. 2022

Supercond. Sci. Technol.

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One-dimensional c-axis-aligned BaZrO3 (BZO) nanorods are regarded as strong one-dimensional artificial pinning centers (1D-APCs) in BZO-doped YaBa2Cu3O7-x (BZO/YBCO) nanocomposite films. However, a microstructure analysis has revealed a defective, oxygen-deficient YBCO column around the BZO 1D-APCs due to the large lattice mismatch of ~7.7% between the BZO (3a=1.26 nm) and YBCO (c=1.17 nm), which has been blamed for the reduced pinning efficiency of BZO 1D-APCs. Herein, we report a dynamic lattice enlargement approach on the tensile strained YBCO lattice during the BZO 1D-APCs growth to induce c-axis elongation of the YBCO lattice up to 1.26 nm near the BZO 1D-APC/YBCO interface via Ca/Cu substitution on single Cu-O planes of YBCO, which prevents the interfacial defect formation by reducing the BZO/YBCO lattice mismatch to ~1.4%. Specifically, this is achieved by inserting thin Ca0.3Y0.7Ba2Cu3O7-x (CaY-123) spacers as the Ca reservoir in 2-6 vol.% BZO/YBCO nanocomposite multilayer (ML) films. A defect-free, coherent BZO 1D-APC/YBCO interface is confirmed in transmission electron microscopy and elemental distribution analyses. Excitingly, up to five-fold enhancement of Jc (B) at magnetic field B=9.0 T//c-axis and 65-77 K was obtained in the ML samples as compared to their BZO/YBCO single-layer (SL) counterpart’s. This has led to a record high pinning force density Fp together with significantly enhanced Bmax at which Fp reaches its maximum value Fp,max for BZO 1D-APCs at B//c-axis. At 65 K, the Fp,max ~158 GN/m3 and Bmax ~ 8.0 T for the 6% BZO/YBCO ML samples represent a significant enhancement over Fp,max ~36.1 GN/m3 and Bmax ~ 5.0 T for the 6% BZO/YBCO SL counterparts. This result not only illustrates the critical importance of a coherent BZO 1D-APC/YBCO interface in the pinning efficiency, but also provides a facile scheme to achieve such an interface to restore the pristine pinning efficiency of the BZO 1D-APCs.

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“…With the addition of the BHO phase, a further increase of the anisotropy is observed in the field and current maps in figure 6 and in the q G v ( ) dependence in figure 7(a). The BHO nanocomposites are known to form nanorods oriented parallel to the c-axis in the PLD-YBCO matrix of conventional films without tilted geometry [32]. However, BHO nanoprecipitates tend to orient roughly parallel to the ab-planes for GdBCO films on ISD-MgO templates with q =  24 v [33].…”

Section: J C Anisotropy In Films With Tilted C-axismentioning

confidence: 99%

Planar current anisotropy and field dependence of J _c in coated conductors assessed by scanning Hall probe microscopy

Lao

Hecher

Sieger

et al. 2016

Supercond. Sci. Technol.

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The local distribution of the critical current density, Jc, of coated conductors and YBa2Cu3O (YBCO) films on single crystalline substrate was investigated by scanning Hall probe microscopy. The high spatial resolution of the measurements enabled an assessment of dependence of the local Jc on the local magnetic induction, B, and electric field, E. The derived Jc(B)-dependence agreed well with the global Jc obtained from magnetization loops and provided values of Jc at very low fields, which are inaccessible to magnetization and transport measurements. The anisotropic current flow within the film plane was investigated in YBCO films on miscut SrTiO3 substrates and a GdBa2Cu3O film on an MgO buffer layer prepared by inclined substrate deposition on a Hastelloy substrate. The c-axis currents calculated from the Hall maps were significantly larger than previously reported data obtained from direct transport measurements. The planar current anisotropy at 77 K was found to be highly influenced by the microstructure which can either deteriorate the current flowing across the ab-planes or cause enhanced pinning and increase the critical current flowing parallel to the ab-planes.

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Cited by 13 publications

References 11 publications

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Enabling coherent BaZrO₃nanorods/YBa₂Cu₃O_7−xinterface through dynamic lattice enlargement in vertical epitaxy of BaZrO₃/YBa₂Cu₃O_7−xnanocomposites

Planar current anisotropy and field dependence of J _c in coated conductors assessed by scanning Hall probe microscopy

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Cited by 13 publications

References 11 publications

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Enabling coherent BaZrO3nanorods/YBa2Cu3O7−xinterface through dynamic lattice enlargement in vertical epitaxy of BaZrO3/YBa2Cu3O7−xnanocomposites

Planar current anisotropy and field dependence of J c in coated conductors assessed by scanning Hall probe microscopy

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Enabling coherent BaZrO₃nanorods/YBa₂Cu₃O_7−xinterface through dynamic lattice enlargement in vertical epitaxy of BaZrO₃/YBa₂Cu₃O_7−xnanocomposites

Planar current anisotropy and field dependence of J _c in coated conductors assessed by scanning Hall probe microscopy