Critical current density of TlBa2Ca2Cu3O9 thin films on MgO (100) in magnetic fields

Piehler, Armin; Strobel, Julian; Reschauer, N.; Löw, R.; Schönberger, Rolf; Renk, K. F.; Kraus, M.; Daniel, Josef; Saemann‐Ischenko, G.

doi:10.1016/0921-4534(94)91283-1

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…TlBa 2 Ca 2 Cu 3 O 9−δ (Tl-1223) superconductor phase is one of the most interesting phases in the thallium cuprates system since its superconducting transition temperature T C is above 114 K [1] and it has a critical current density higher than that of Y-123 compounds as well as very high irreversibility lines [2,3]. The doping in this phase may in some cases enhance the superconducting transition temperature and improve the physical properties of the pure samples.…”

Section: Introductionmentioning

confidence: 99%

Electric resistivity and magnetic susceptibility studies of Tl-1223 substituted by cobalt

Isber¹,

Awad²,

Abou‐Aly³

et al. 2005

Supercond. Sci. Technol.

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Bulk superconductor samples of type TlBa 2 Ca 2 (Cu 3−x Co x )O 9−δ with 0 x 0.6 were prepared by a single-step solid-state reaction. The prepared samples were characterized by powder x-ray diffraction and the superconductivity of these samples was investigated by electrical resistivity and ac magnetic susceptibility. The x-ray data indicate that the lattice parameters a and c vary but the structure of Tl-1223 remains tetragonal with cobalt substitution up to x = 0.6. The transition temperature 'T C ', deduced from electrical resistivity and ac magnetic susceptibility measurements, is suppressed by substituting Co impurities at Cu sites. The suppression in T C has been discussed using a Cooper pair-breaking mechanism due to the Abrikosov and Grokov model. The effects of external magnetic field on the ac magnetic susceptibility as well as calculations of critical current density as a function of cobalt content and temperature are reported.

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Section: Introductionmentioning

confidence: 99%

Electric resistivity and magnetic susceptibility studies of Tl-1223 substituted by cobalt

Isber¹,

Awad²,

Abou‐Aly³

et al. 2005

Supercond. Sci. Technol.

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“…Since the discovery of superconductivity in the TlBaCaCuO system [1], enormous efforts have been made to synthesize reproducibe and selective single phases both as bulk [2][3][4][5][6][7] and thin-film [8][9][10][11][12] materials.…”

Section: Introductionmentioning

confidence: 99%

Reproducible synthesis by metal-organic chemical vapour deposition and thallium vapour diffusion of oriented thin-films : intergrowth of and structures

Malandrino¹,

Condorelli²,

Fragalá³

et al. 1996

Supercond. Sci. Technol.

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Superconducting thin-films containing randomly disordered layers of TlBa 2 Ca 2 Cu 3 O 9 and Tl 2 Ba 2 Ca 2 Cu 3 O 10 have been synthesized through a combined approach of metal-organic chemical vapour deposition (MOCVD) and thallium vapour diffusion. The BaCaCu matrices have been deposited onto yttria stabilized zirconia (YSZ) substrates using the second generation Ba(hfa) 2 tetraglyme and Ca(hfa) 2 tetraglyme (hfa denotes hexafluoroacetylacetonate), and the Cu(acac) 2 (acac denotes acetylacetonate) as volatile metal-organic precursors. BaCaCu precursor films of composition 2:2:3 were annealed in the presence of a mixture of thallium (III), barium, calcium and copper oxides at temperatures of 840-860 • C and oxygen partial pressure varying from 0.04-0.5 atm. The formation of an oriented Tl 1+x Ba 2 Ca 2 Cu 3 O 9+x (x ≈ 0.5) intergrowth structure has been observed in narrow temperature and oxygen partial pressure ranges. The electrical resistivity data show T c 0 = 101 K which, in accordance with the scanning electron microscopy image, appears indicative of a material with weakly linked grains.

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“…These materials are distinguished by their elevated superconducting transition temperature (T c ), strong pinning efficiency, and irreversible fields that are pushed to higher levels [2]. Because of these properties, the Tl-1223 and Hg-1223 phases have the potential to be desirable materials for creating superconducting wires, tapes, and thin films [3]. These applications are critical in fields like sensors, electronics, power lines, and magnetic shielding devices, demonstrating HTSCs' adaptability and promise in current technology [4].…”

Section: Introductionmentioning

confidence: 99%

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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Critical current density of TlBa2Ca2Cu3O9 thin films on MgO (100) in magnetic fields

Cited by 10 publications

References 6 publications

Electric resistivity and magnetic susceptibility studies of Tl-1223 substituted by cobalt

Electric resistivity and magnetic susceptibility studies of Tl-1223 substituted by cobalt

Reproducible synthesis by metal-organic chemical vapour deposition and thallium vapour diffusion of oriented thin-films : intergrowth of and structures

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

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