Orientation Behavior and Mechanism of Ag-doped GdBa2Cu3O7-δ Superconducting thin Films Derived by Metal Organic Deposition

Sun, Meijuan; Liu, W. Q.; He, Kai; Liu, Z. Y.; Chen, S. G.; Cai, Chuanbing

doi:10.1007/s10948-018-4562-6

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…However, with respect to pure YBCO, chemical solution deposition (CSD) of GdBCO film requires more accurate control of the process parameters, especially during the crystallization step. In fact, GdBCO nucleation is favored by higher growth temperatures, faster ramp rates, and lower oxygen partial pressure (pO 2 ) than those used in the YBCO process [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Chemical Solution Deposition of YBCO Films with Gd Excess

et al. 2020

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Chemical solution deposition of Gd-doped YBCO, Y1GdyBa2Cu3O7−δ, (YBCO-Gd), film was carried out following the metal‑organic decomposition approach and in situ route. Two dopant concentrations, 5 and 10 mol %, were evaluated. The morphology and crystalline structure of the superconductor films were deeply investigated. In general, a homogeneous and well c-axis oriented film was observed by using scanning and transmission electron microscopy (SEM and TEM) and X-ray diffraction. However, compared to pure YBCO, YBCO-Gd samples showed an increased stacking faults concentration, as recognized by TEM. X-ray photoelectron spectroscopy allowed studying the Gd distribution in the films and gathered information about the Gd electronic environment. Superconducting properties were evaluated at different temperatures, magnetic field directions, and intensities. Higher zero‑field critical current densities were measured with respect to undoped samples in the temperature range from 10 to 77 K with both Gd concentrations (i.e., 28, 27, and 13 MA·cm−2, respectively, for YBCO-Gd 5%, YBCO-Gd 10%, and undoped YBCO at 10 K in self field condition). At low temperatures, this improvement was maintained up to 12 T, confirming the efficacy of Gd addition for the enhancement of transport properties of YBCO film.

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Section: Introductionmentioning

confidence: 99%

Chemical Solution Deposition of YBCO Films with Gd Excess

et al. 2020

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“…Conversely, some articles reported that YBCO films prepared by MOD and using Au, Ag, and Pb as dopants showed an improvement in morphology along with higher self-field J c values. In those cases, when a metallic dopant is used, the formation of intermetallic phases is likely responsible for chemical potential changes of c - and a -axis nucleations favoring the c -axis orientation. − In analogy to such studies, it may be assumed that the addition of ND is beneficial to c -axis film nucleation during the crystallization step. However, in the case of carbon-based nanomaterials (CBNs), the intermetallic phase formation can be excluded, so a different mechanism (or influence) should be hypothesized.…”

Section: Introductionmentioning

confidence: 99%

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

Pinto

Vannozzi

Celentano

et al. 2023

Crystal Growth & Design

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It was recently shown that the introduction of nanodiamond (ND) into a superconducting metal–organic deposited YBa2Cu3O7−δ (YBCO) film produces an increase in critical current density in self-field conditions (B = 0 T). Such improvement appears to be due to the formation of denser and smoother films than the samples deposited without ND. This paper presents the work done to understand the role of ND during YBCO nucleation and growth. A detailed study on YBCO+ND films quenched at different temperatures of the crystallization process was carried out. Results showed that the reaction responsible for YBCO production appeared effectively affected by ND. In particular, ND stabilizes one of the YBCO precursors, BaF2(1–x)O x , whose conversion into YBCO requires a prolonged time. Therefore, the YBCO nucleation is slowed down by ND and begins when the experimental conditions favor both thermodynamically and kinetically the formation of YBCO along the c-axis. This effect has important implications because the growth of a highly epitaxial c-axis YBCO film enables excellent superconducting performance.

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