The effect of PbF2 doping on the structural, electrical and mechanical properties of (Bi,Pb)–2223 superconductor

Anas, M.

doi:10.1016/j.cplett.2019.137033

Cited by 18 publications

(10 citation statements)

References 40 publications

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“…As evidenced further by the variation of the lattice parameters (a and c), whose values slightly drop and rise, respectively. Abu Hlaiwa et al [24] and Anas et al [45] came to similar findings when examining the impact of PbF 2 on the physical characteristics of the (Cu, Tl)-1223 and (Bi, Pb)-2223 superconducting phases, respectively. (ii) The charge balancing issues caused by the substitution of fluorine ions for oxygen ions should lead to a reduction in the carrier (holes) density in p-type superconductors [43].…”

Section: Resultsmentioning

confidence: 63%

Effects of Thallium fluoride substitution on the flux pinning energies of (Cu0.5, Tl0.5)Ba2Ca2Cu3O10-δ superconductors

et al. 2022

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In the present work, the magnetoresistance behavior of (TlF)x-substituted (Cu0.5,Tl0.5)Ba2Ca2Cu3O10−δ superconducting samples, with x = 0.0, 0.1, 0.2, 0.3 and 0.4, was investigated. According to the thermally activated flux creep (TAFC) model, the flux pinning energies U(H, T) were calculated from the resistivity temperature (ρ–T) curves at applied DC magnetic fields ranging from 0.29 to 4.44 kOe. The results indicated that flux pinning energy was increased with increasing the F-substituting up to x = 0.1 and then decreased with increasing the applied field up to 4.44 kOe. Moreover, significant resistive broadening (ΔT) was observed with increasing the values of the applied magnetic fields. Furthermore, the (TlF)x substitution, boosting the transport critical current density Jc(0) and irreversibility magnetic field Hirr(0) up to x = 0.1 and then decreasing for x > 0.1 at various applied magnetic fields, demonstrates strong flux pinning for x = 0.1.

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Section: Resultsmentioning

confidence: 63%

Effects of Thallium fluoride substitution on the flux pinning energies of (Cu0.5, Tl0.5)Ba2Ca2Cu3O10-δ superconductors

et al. 2022

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“…This reduction is assumed to be because the ionic radii of Sm 3+ (0.96 Å) and La 3+ (1.03 Å) are less than those of Ca 2+ ions (1.12 Å) [24,25]. Furthermore, an increase in fluorine might explain the reduction in the lattice parameter c. This is due to two possible factors: first, fluorine has a slightly lower ionic radius (1.47 Å) than oxygen (1.52 Å), and second, fluorine has a greater electronegativity (3.98) than oxygen (3.44) [15]. The contraction rate of c is expected to be (dc/dx) = −0.48 and −0.76 as Sm and La content increases, respectively.…”

Section: Sample Investigationmentioning

confidence: 98%

“…Furthermore, the reduction in the number of holes in CuO 2 planes caused by the partial substitution of Ca 2+ ions by Sm 3+ or La 3+ ions may be the cause of the increase in T c . Moreover, because T c was observed to climb with increasing O loss, removing oxygen from the structure by F substitution resulted in a decrease in hole concentration and optimization of the superconducting characteristics [15]. Therefore, at x = 0.025, the unsubstituted sample is changed from an over-doped sample to an optimally doped sample.…”

Section: Electrical Resistivity Measurementsmentioning

confidence: 99%

“…In terms of manufacturing conditions and product design factors, improving the mechanical characteristics of HTSCs is crucial from a technological and financial perspective. Many researchers investigated the influence of fluorine (F) doping on HTSC characteristics [15,16]. The effect of PbF 2 doping on the structural, electrical, and mechanical properties of (Bi, Pb)-2223 was investigated by Anas [15].…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers investigated the influence of fluorine (F) doping on HTSC characteristics [15,16]. The effect of PbF 2 doping on the structural, electrical, and mechanical properties of (Bi, Pb)-2223 was investigated by Anas [15]. XRD and SEM analysis revealed that x = 0.10 resulted in the greatest volume fraction and largest grain size.…”

Section: Introductionmentioning

confidence: 99%

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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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Mechanical Properties of Superconducting Materials

Hannachi

Slimani

2022

Superconducting Materials

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The effect of PbF2 doping on the structural, electrical and mechanical properties of (Bi,Pb)–2223 superconductor

Cited by 18 publications

References 40 publications

Effects of Thallium fluoride substitution on the flux pinning energies of (Cu0.5, Tl0.5)Ba2Ca2Cu3O10-δ superconductors

Effects of Thallium fluoride substitution on the flux pinning energies of (Cu0.5, Tl0.5)Ba2Ca2Cu3O10-δ superconductors

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

Mechanical Properties of Superconducting Materials

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