Fabrication, phase composition and properties of (Tl, Bi, Pb)(Sr, Ba)2Ca2Cu3Ozsuperconductors

Mair, M.; König, W.; Gritzner, G.

doi:10.1088/0953-2048/8/12/008

Cited by 24 publications

(16 citation statements)

References 17 publications

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“…(6) Eq. (7) (Tl 0. results show that the approach through the model of resistance of the Josephson weak links [5] could be used to describe the properties of the intergranular weak links of thallium bulk samples which have plate-like grains of 15−20 µm long [9]. On the contrary, intergranular properties of the thin film samples are different because they obey relation (6) with different values of exponents than 2/3.…”

Section: Tablementioning

confidence: 98%

Effect of Magnetic Field on Resistive Transition of Thin Film Thallium Based Superconductors

et al. 2004

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The temperature and magnetic field dependences of a.c.resistance of c-axis oriented (Tl0.5Pb0.5)(Sr0.8Ba0.2)2Ca2Cu3Ox and (Tl 0.6 Pb 0.24 Bi 0.16 )(Sr 0.9 Ba 0.1 ) 2 Ca 2 Cu 3 O x thin films as well as of (Tl0.5Pb0.5)(Sr0.8Ba0.2)2Ca2Cu3Ox bulk sample from 77 K to room temperature and in magnetic fields from zero to 3000 Oe were measured and analyzed. The magnetic field and temperature dependence of the resistive superconducting transition and irreversibility field were discussed both in the flux-creep model and in the superconducting liquid vortex state model. The temperature width of resistive transition was explained taking advantage of the Ambegaokar and Halperin model of the resistance of superconducting Josephson weak links and barrier of vortex motion presented by Tinkham. The irreversibility field was described by an exponential formula.

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Section: Tablementioning

confidence: 98%

Effect of Magnetic Field on Resistive Transition of Thin Film Thallium Based Superconductors

et al. 2004

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“…A sintered ceramic (T1 0.6 Pb0.5)(Sr0.9 Ba0.1 ) 2 Ca2 Cu3 Oy superconductor with a critical temperature (TT(0)) of 118 K was prepared with Tc of 118 K by a procedure described elsewhere [1][2][3]. The porosity of this sample was 9% and the amount of the secondary phase was 5%.…”

Section: Resultsmentioning

confidence: 99%

Inter- and Intragrain Magnetization of Thallium-Based Superconductors

et al. 2000

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We report on magnetization and magnetic hysteresis measurements for the (Tl0.6 Bi0.5 )(Sr0.9 Ba0.1 ) 2 Ca2 Cu3 O, Ag-sheathed superconducting tape as well as for the powdered and bulk (Tl0.6Pb0.5)(Sr0.9Ba0.1)2Ca2Cu3O y superconductors. For the investigated tape and bulk specimens the low field magnetization showed a deviation from the ideal linear M(H) dependence, which was attributed to the superposition of inter-and intergrain superconducting currents. Fitting of the theoretical magnetization curves to the experimental data allowed for the independent determination of the i n t e r g r a i n c r i t i c a l c u r r e n t d e n s i t i e s f o r t h e s u p e r c o n d u c t i n g g r a i n s a n d i n t e r g r a i n critical current densities for the weak link system at 77 K.

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“…6 Pb0. ․ )(Sr0.9Ba0.1)2Ca2Cu3O y and (Bi1.75Pb0.35)Sr1.9Ca2.05Cu3.05Oy superconductors were prepared by solid-state reaction with the superconducting transition temperature T0 of 118 K and 103 K, respectively, by a procedure described elsewhere [28][29][30].…”

Section: Methodsmentioning

confidence: 99%

Photoemission Electronic States of Thallium- and Bismuth-Based Superconductors

et al. 2000

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X-ray photoemission spectra the core-levels as well as the X-ray photoemission spectra and ultraviolet photoemission spectra from the valence bands of the (Tl0.6Pb0. ․ )(Sr0.sBa0.3)Ca2Cu3O y and (Bi1.75Pb0.35 )Sr1.9Ca2.05Cu3.05 O y superconductors were measured and analyzed. Special attention was paid to the valence band X-ray photoemission spectra and ultraviolet photoemission spectra, the Cu 2p core-level X-ray photoemission spectra and the Cu L2,3 -M4,5 M4,5 and O K -L2,3 L2,3 Auger spectra. Both Cu 223 3 /2 and Cu 223 1 /2 core-level lines consisted of two spin-orbit split main lines accompanied with the two satellite lines. The charge transfer energy Δ from the oxygen ligand to the copper 3d 9 states and the hopping integral t were estimated from the energy separation between the main line and the satellite line taking advantage of the local cluster model calculations and their extension to high-temperature superconductors. The Coulomb correlation on-site energy Udd of two electrons in the same copper orbital and Upp of two electrons in the oxygen orbital as well as the correlation energy Ucd of the 2p core hole -3d electron interaction have been estimated from the Auger electron spectra and the valence band spectra. They are: Uda = 6.0 ± 0.5 eV, of Upp 10 ± 1 eV and of (lcd 8.0 ± 0.5 eV nearly the same for both the Tl-and Bi-compounds. We conclude that these compounds are the charge transfer strongly-correlated metals.

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Fabrication, phase composition and properties of (Tl, Bi, Pb)(Sr, Ba)₂Ca₂Cu₃O_zsuperconductors

Cited by 24 publications

References 17 publications

Effect of Magnetic Field on Resistive Transition of Thin Film Thallium Based Superconductors

Effect of Magnetic Field on Resistive Transition of Thin Film Thallium Based Superconductors

Inter- and Intragrain Magnetization of Thallium-Based Superconductors

Photoemission Electronic States of Thallium- and Bismuth-Based Superconductors

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