Growth of simplified buffer template on flexible metallic substrates for YBa2Cu3O  coated conductors

Xue, Yan; Zhang, Yahui; Zhang, Fei; Zhao, Ruwei; Wang, Hui; Xiong, Jie; Tao, Bowan

doi:10.1016/j.jallcom.2016.02.175

Cited by 18 publications

(9 citation statements)

References 32 publications

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“…In our experiments, the GdYBCO films were prepared by the MOCVD system on the templates of sputtered-LaMnO 3 (LMO)/homo-epitaxial MgO/IBAD (ion beam-assisted deposition)-MgO/SDP (solution deposition planarization)-Y 2 O 3 /Hastelloy tapes [22,23,24,25,26], as shown in Figure 3. The metal tapes were directly heated by self-resistance after applying a heating current.…”

Section: Methodsmentioning

confidence: 99%

Multi-Aperture Shower Design for the Improvement of the Transverse Uniformity of MOCVD-Derived GdYBCO Films

et al. 2017

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A multi-aperture shower design is reported to improve the transverse uniformity of GdYBCO superconducting films on the template of sputtered-LaMnO 3 /epitaxial-MgO/IBAD-MgO/solution deposition planarization (SDP)-Y 2 O 3 -buffered Hastelloy tapes. The GdYBCO films were prepared by the metal organic chemical vapor deposition (MOCVD) process. The transverse uniformities of structure, morphology, thickness, and performance were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), step profiler, and the standard four-probe method using the criteria of 1 µV/cm, respectively. Through adopting the multi-aperture shower instead of the slit shower, measurement by step profiler revealed that the thickness difference between the middle and the edges based on the slit shower design was well eliminated. Characterization by SEM showed that a GdYBCO film with a smooth surface was successfully prepared. Moreover, the transport critical current density (J c ) of its middle and edge positions at 77 K and self-field were found to be over 5 MA/cm 2 through adopting the micro-bridge four-probe method.

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Section: Methodsmentioning

confidence: 99%

Multi-Aperture Shower Design for the Improvement of the Transverse Uniformity of MOCVD-Derived GdYBCO Films

et al. 2017

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“…In our experiments, the substrate used for reel-to-reel metal organic chemical vapor deposition of GdYBCO film was a stack of sputtered-LaMnO 3 /homo-epitaxial MgO/IBAD-MgO/ solution deposition planarization-Y 2 O 3 /Hastelloy tapes [31][32][33][34][35], as is shown in figure 1. Heating current (I h ) was conducted from the two edges of the template tape into the Hastelloy metal tape [36,37].…”

Section: Methodsmentioning

confidence: 99%

High utilization ratio of metal organic sources for MOCVD-derived GdYBCO films based on a narrow channel reaction chamber

Zhao

Liu

Xia

et al. 2017

Supercond. Sci. Technol.

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A narrow channel reaction chamber is designed in our home-made MOCVD system and applied to deposit GdYBCO films on the template of LaMnO3/epitaxial MgO/IBAD-MgO/solution deposition planarization-Y2O3-buffered Hastelloy tapes. In the reaction chamber, metal organic sources are transferred from the inlet to the outlet along the direction of the tape movement. Thus, compared to the vertical injection way of metal organic sources, the residence time of metal organic sources on the surface of substrates would be extended through adopting the novel reaction chamber. Therefore, the utilization of metal organic sources, which is calculated according to the measured results of experiments, can reach 31%. Additionally, the utilization ratio of metal organic sources based on the novel reaction chamber is basically two times as much as that of the commonly used vertical injection slit shower. What is more, through adjusting the process, the critical current density of 300 nm thick GdYBCO film prepared the reel-to-reel way has reached 3.2 MA cm−2 (77 K, 0 T).

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“…Compared with inclined substrate deposition and ionbeam-assisted deposition approaches [21][22][23][24], the NiW-RABiTS approach is used in this work, due to its superiority in the preparation of double-sided tape and its simplicity of using low-cost sol-gel process for film deposition [25][26][27][28]. The detailed analyses of gradient La 2−x Gd x Zr 2 O 7 buffer architecture and YBCO films on NiW substrate are presented.…”

Section: Introductionmentioning

confidence: 99%

Highly epitaxial YBa₂Cu₃O_7−δ films grown on gradient La_2−xGd _x Zr₂O₇-buffered NiW-RABiTS using all sol–gel process

Liu¹,

Li²,

Zhao³

et al. 2021

Supercond. Sci. Technol.

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The overall purpose of this work is to develop a reliable and low-cost technique for fabrication of coated conductors (CCs) on the flexible substrates, and to understand the effects of oriented growth and microstructure on the superconducting performance of CCs in-depth. The investigations of gradient La2−x Gd x Zr2O7 buffer architecture and YBa2Cu3O7−δ (YBCO) film on Ni-5at%W rolling-assisted biaxially textured substrate using all sol–gel process are reported. Combining x-ray diffraction and transmission electron microscopy (TEM) analysis, it is revealed that the gradient buffer architecture with increased lattice constant along the direction of film growth has an excellent c-axis orientation, while the inversed gradient architecture with decreased lattice constant shows the deteriorated orientation, indicating that the highly epitaxial growth mechanism most likely related to the interfacial lattice matching degree. The detailed analysis of YBCO films grown on gradient La2−x Gd x Zr2O7 under different deposition parameters, and the influence of microstructure on electrical properties are systematically discussed using x-ray diffraction, rocking curve test, scanning electron microscopy and TEM observations. Finally, the excellent biaxial texture YBCO film on gradient La2−x Gd x Zr2O7 buffer architecture is prepared at a proper heat-treatment temperature of 780 °C, and the full width at half maximum of ϕ-scan and ω-scan are 5.9° and 6.4°, respectively. The critical transition temperature T c,onset of the as-prepared YBCO film is 90 K. With elevating the temperatures, the appearance of a large number of weak-link and amorphous regions, being indicative of the microstructural collapse, is mainly responsible for the reduced superconductivity.

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Growth of simplified buffer template on flexible metallic substrates for YBa2Cu3O coated conductors

Cited by 18 publications

References 32 publications

Multi-Aperture Shower Design for the Improvement of the Transverse Uniformity of MOCVD-Derived GdYBCO Films

Multi-Aperture Shower Design for the Improvement of the Transverse Uniformity of MOCVD-Derived GdYBCO Films

High utilization ratio of metal organic sources for MOCVD-derived GdYBCO films based on a narrow channel reaction chamber

Highly epitaxial YBa₂Cu₃O_7−δ films grown on gradient La_2−xGd _x Zr₂O₇-buffered NiW-RABiTS using all sol–gel process

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Growth of simplified buffer template on flexible metallic substrates for YBa2Cu3O coated conductors

Cited by 18 publications

References 32 publications

Multi-Aperture Shower Design for the Improvement of the Transverse Uniformity of MOCVD-Derived GdYBCO Films

Multi-Aperture Shower Design for the Improvement of the Transverse Uniformity of MOCVD-Derived GdYBCO Films

High utilization ratio of metal organic sources for MOCVD-derived GdYBCO films based on a narrow channel reaction chamber

Highly epitaxial YBa2Cu3O7−δ films grown on gradient La2−x Gd x Zr2O7-buffered NiW-RABiTS using all sol–gel process

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Highly epitaxial YBa₂Cu₃O_7−δ films grown on gradient La_2−xGd _x Zr₂O₇-buffered NiW-RABiTS using all sol–gel process