Investigation of superconducting and elastic parameters of YBCO/LSMO thick films

Sahoo, Bibekananda; Behera, D.

doi:10.1007/s10854-019-01661-x

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…4 is more pronounced for Ag added x = 0.6 samples. The suppression of T c onset is consistent with the known behavior of the bulk superconductors when adding small amounts of magnetic impurities [30][31][32][33].…”

Section: Excess Conductivity Methodssupporting

confidence: 85%

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Conductivity Fluctuation and Some Parameters of High temperature Superconductor Polycrystalline Y1Ba2Cu3O7−δ doped with Silver Nanoparticles

Shams

Ranjbar

2019

Braz J Phys

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In this study, we report the effect of Ag nanoparticles doping on the dimensional fluctuations of superconducting order parameters, crystal structure, and some parameters of Y 1 Ba 2 Cu 3 O 7−δ + × Ag (x = 0.0, 0.06, 0.1, 0.3, and 0.6 wt%) polycrystalline ceramics. By increasing the content of Ag in YBCO matrix, X-ray diffraction (XRD) with the Rietveld refinement technique revealed that the crystal lattice parameters changed and the orthorhombicity decreased slightly. Also, the increase of Ag wt% caused a decrease of superconducting transition temperatures (Tc) which are determined from the standard four-probe method and dropped abruptly. Aslamazov-Larkin (AL) model was used to analyze excess conductivity fluctuation. Lawerence-Doniach (LD) temperature named T LD which is responsible for the dimensional nature of fluctuation inside the grains is influenced by nano-silver combination in the compound. Crossover temperature from 2D to 3D (T LD) decreased in the mean-field region as a resultant dominance of 3D region by increasing of Ag in YBCO matrix. The decrease in zero-resistance critical temperature (T c zero), zero-temperature coherence length along the c-axis ξ c (0), and super layer length d values implies the degradation of inter-grain weak links, more disorder state of samples and unsettling of the mean free path for the charge carriers respectively with addition of silver nanoparticles. The calculations based on AL and LD model showed the highest anisotropy (γ = 1.34681) for the x = 0.6 sample. The size of the Ag ions, being larger compared to Cu ions, and the number of substitution sites affects the coupling between the CuO2 planes and that results in higher anisotropy. Critical magnetic fields B c1 (0), B c2 (0), and critical current density J c (0) were indirectly calculated from the Ginzburg-Landau (GL) number and GL equations. By increasing the doping level of silver nanoparticle, these parameters were found to be higher in Ag-added YBCO samples compared to the pure Y123, meaning better intrinsic flux pinning properties of doped Y123. The silver nanoparticle inclusion reduces the grain size and increases the strength and hardness of the parent compound.

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Section: Excess Conductivity Methodssupporting

confidence: 85%

“…6a. This regime was also observed in others not only polycrystalline [30] but also in single crystal [42] and thin film [43] samples. The solid lines in mean-field regions represent theoretical fits with the slopes of − 0.5, − 1 and − 1.5 for 3-D, 2-D, and 1-D systems, respectively.…”

Section: Excess Conductivity Methodssupporting

confidence: 80%

Conductivity Fluctuation and Some Parameters of High temperature Superconductor Polycrystalline Y1Ba2Cu3O7−δ doped with Silver Nanoparticles

Shams

Ranjbar

2019

Braz J Phys

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“…According to the graph, H V values exhibit two different behaviors as applied load (F) increases: a fast reduction in H V values in the applied force up to 2.94 N, followed by steady saturation (plateau region) at higher applied forces. This nonlinear behavior has been observed in various literature [43][44][45][46]. This behavior is commonly referred to as a normal indentation size effect NISE and is associated with the weak grain boundaries found in ceramic materials [45].…”

Section: Vickers Microhardness Measurement Examinationmentioning

confidence: 70%

Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides

Khattar,

Anas,

Awad

et al. 2023

Condensed Matter

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This study investigated the impact of samarium and lanthanum fluorides (SmF3 and LaF3) on the physical and mechanical properties of Tl0.8Hg0.2Ba2Ca2−xRxCu3O9−δ−yFy superconducting phases (specifically the (Tl, Hg)-1223 phase), where R = Sm and La, with 0.00 ≤ x ≤ 0.10. The superconducting samples were synthesized using the solid-state reaction method. X-ray diffraction (XRD) verified the formation of the (Tl, Hg)-1223 phase without altering its tetragonal structure. Scanning electron micrographs (SEM) reveal the improvement of the grain size and inter-grain connectivity as Sm and La contents increased up to x=0.025. The electrical properties of (Tl, Hg)-1223 were studied using I-V and electrical resistivity measurements. Improved superconducting transition temperature (Tc) and transport critical current density (Jc) were observed up to x=0.025, beyond which they decreased substantially. Vickers microhardness (Hv) measurements were performed at room temperature to investigate their mechanical performance with various applied loads (0.49–9.80 N) and times (10–90 s). For both substitutions, the mechanical properties were enhanced up to an optimal value at x=0.025. All samples exhibited normal indentation size effect (ISE) behavior. The proportional sample resistance (PSR) model best explained Hv values among five theoretical models. Dislocation creep was the primary creep mechanism in the samples, according to indentation creep studies.

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“…It was found that for all samples, the H v values were load-dependent, as H v decreased non-linearly with increasing the applied load until F = 2.94 N, then nearly attained saturation showing a nearly plateau region, at higher loads. This behavior is known as the normal indentation size effect (ISE) (Awad et al, 2014;Sahoo & Behera, 2019). The normal ISE behavior can be explained based on the indenter's penetration depth.…”

Section: Vickers Microhardnessmentioning

confidence: 99%

“…At small loads, the indenter penetrates the surface of the sample, limiting the load effect to the surface layer only. However, at higher loads, the depth of penetration increases, and then the effect of the inner layers dominates (Awad et al, 2014;Sahoo & Behera, 2019). (Awad et al, 2014;Sangwal, 2000).…”

Section: Vickers Microhardnessmentioning

confidence: 99%

A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

Shmait¹,

Ghouch²,

Boukhari³

et al. 2021

MAS

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ZnO and ZnAl2O4 nanoparticles (NPs) were successfully prepared by the co-precipitation method and characterized by x-ray powder diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The prepared NPs were incorporated into epoxy (EP) coating with mass ratios 200  800 mg/kg of ZnO NPs/EP and ZnAl2O4 NPs /EP. The prepared coatings were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy, and their mechanical properties were investigated, at room temperature, after 5, 10, 15, and 20 days of preparation. Tensile tests showed an improvement in the tensile properties, with the best improvement in ultimate tensile strength (93.2%) for 800 mg/kg ZnAl2O4 NPs/EP coating after 15 days of preparation. The ZnO NPs/EP and ZnAl2O4 NPs/EP coatings exhibited noticeable sensitivity to the stretching rate. Vickers microhardness (Hv) investigations showed normal indentation size effect behavior for all the samples. The best improvement in Hv was attained after 5 days of preparation, for all coatings, with the best improvement (9.15%) for 700 mg/kg ZnO NPs/EP.

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Investigation of superconducting and elastic parameters of YBCO/LSMO thick films

Cited by 15 publications

References 46 publications

Conductivity Fluctuation and Some Parameters of High temperature Superconductor Polycrystalline Y1Ba2Cu3O7−δ doped with Silver Nanoparticles

Conductivity Fluctuation and Some Parameters of High temperature Superconductor Polycrystalline Y1Ba2Cu3O7−δ doped with Silver Nanoparticles

Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides

A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

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