Phase composition and properties of superconducting ceramics based on Bi1.7Pb0.3Sr2Ca2Cu3O y precursors fabricated by melt quenching in a solar furnace

Gulamova, D. D.; Uskenbaev, D. E.; Fantozzi, Gilbert; Chigvinadze, J. G.; Magradze, O. V.

doi:10.1134/s1063784209060140

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…A typical dissipation δ maximum correlating with a sharp change (increase) of the oscillation period t, is changed at All these makes it possible to suppose the presence of precursors of superconductive regions in the investigated by us HTSC samples up to the 138 K temperature. This supposition is confirmed by measurements of our sample's resistance temperature dependence at the transition into superconducting state where besides the 2223 phase it is clearly seen the presence of other phases [31].…”

Section: Resultssupporting

confidence: 80%

“…we have one more method to define T c . The critical temperature of superconducting transition defined this way coincides with value T c =107 K defined by other methods ( by R and χ ) [31].…”

Section: Samples Under Investigation and Experimentssupporting

confidence: 73%

“…With aim to define the influence of the starting state of precursor (a plate and viskers) on the phase formation at crystallization it was for comparison fabricated HTSC samples by both melt and super fast quenching technologies from one side, and the standard solid state phase reaction from other side. This way the fabricated nominal composition The T c =107 K it was showed also standard methods, like R=f(T) and χ=f(T) measurements [31].…”

Section: Samples Under Investigation and Experimentsmentioning

confidence: 91%

“…The samples used in our investigations were synthesized with application of solar energy [3,27] and superfast quenching melt technology [28][29][30]. This way it was manufactured amorphous precursors and their use gives possibility to manufacture of high-density lowporous texturized ceramics with given dimensions of grains [31,32]. Starting mixtures of nominal composition Bi 1,7 Pb 0,3 Sr 2 Ca 2 Cu 3 O 10-δ were prepared from previously annealed at 600 o C Bi 2 О 3 , PbO, SrCO 3 , CaО, CuО powders with purity nor less than "PFA"(pure for analysis).…”

Section: Samples Under Investigation and Experimentsmentioning

confidence: 99%

“…A phase composition was monitored by X-ray diffraction method with a help of DRON-UM1 diffractometer using CuK α radiation and the diffractometer model Rigaku Co, Ltd., Tokyo, Japan. The critical temperature of superconductive transition T c was defined by measurements of electric resistance temperature dependence with four-contact method and the magnetic susceptibility temperature dependence using the mutual induction method [31] and by the mechanical method to study the temperature dependence of frequency and dissipation of a superconductive cylinder suspended by a thin thread and performing axial-torsional oscillation in a magnetic field.…”

Section: Samples Under Investigation and Experimentsmentioning

confidence: 99%

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Temperature dependence investigation of dissipation processes in strongly anisotropic hightemperature superconductors of Bi-Pb-Sr-Ca-Cu-O system synthesized using solar energy

Chigvinadze¹,

Acrivos²,

Ashimov³

et al. 2009

Epitoanyag - JSBCM

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The investigation of temperature dependence of damping and period of vibrations of HTSC superconductive cylinder of Bi-Pb-Sr-Ca-Cu-O system suspended by a thin elastic thread and performing axialtorsional vibrations in a magnetic field at temperatures above the critical one for the main phase T c =107 K were carried out. It was observed some "chaos" temperature region in the temperature interval 107-138 K, where it is seen separate ripples of dissipation and oscillation frequency. It is assumed that the "chaos" region could point to a possibility of existence of other magnetic and more high-temperature phases as single islands in a normal materials matrix.

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Section: Resultssupporting

confidence: 80%

Section: Samples Under Investigation and Experimentssupporting

confidence: 73%

Section: Samples Under Investigation and Experimentsmentioning

confidence: 91%

Section: Samples Under Investigation and Experimentsmentioning

confidence: 99%

Section: Samples Under Investigation and Experimentsmentioning

confidence: 99%

See 3 more Smart Citations

Temperature dependence investigation of dissipation processes in strongly anisotropic hightemperature superconductors of Bi-Pb-Sr-Ca-Cu-O system synthesized using solar energy

Chigvinadze¹,

Acrivos²,

Ashimov³

et al. 2009

Epitoanyag - JSBCM

Self Cite

View full text Add to dashboard Cite

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Critical temperature of the superconducting transition of individual phases of multiphase bismuth cuprates after cooling in a magnetic field to a temperature of 77 K

Chigvinadze

Ashimov

Acrivos

et al. 2019

Low Temperature Physics

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Using a highly sensitive torsional vibration technique, the authors have determined the critical temperatures of the superconducting transition (Tc) of individual phases of multiphase cuprates [Bi1.7Pb0.3Sr2Ca(n-1)CunOy (n = 2–30)] in a constant external magnetic field (H) in the temperature range of 77 to 270 K. It has been found that oscillation damping peaks are more pronounced when a sample is rapidly cooled in an external magnetic field (FC) to a temperature of 77 K and then is slowly warmed to room temperature. An increase in the time of sample exposure to a magnetic field at 77 K leads to a rise in the temperature Tc of different phases, and to an increase in the intensity of a signal corresponding to high-temperature phases with Tc > 240 K. Structural studies have shown that with increasing sample exposure time at 77 K, as a result of sample compression an increase in stress concentration at grain boundaries appears to increase defect density and to enhance the pinning of Abrikosov vortices, i.e. creates new (additional) conditions for their “freezing” during the field cooling (FC) procedure. It has been established that in samples of the Bi1.7Pb0.3Sr2Ca(n-1)CunOy (n = 2–30) series, the critical temperature Tc increases from 107 K to ≥ 240 K with an increase in n.

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Synthesis and Properties of Bi-HTSC synthesized on the basis of precursors obtained by melt quenching

Uskenbaev

Nogay

Mukhamedrakhimova

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Phase composition and properties of superconducting ceramics based on Bi1.7Pb0.3Sr2Ca2Cu3O y precursors fabricated by melt quenching in a solar furnace

Cited by 7 publications

References 11 publications

Temperature dependence investigation of dissipation processes in strongly anisotropic hightemperature superconductors of Bi-Pb-Sr-Ca-Cu-O system synthesized using solar energy

Temperature dependence investigation of dissipation processes in strongly anisotropic hightemperature superconductors of Bi-Pb-Sr-Ca-Cu-O system synthesized using solar energy

Critical temperature of the superconducting transition of individual phases of multiphase bismuth cuprates after cooling in a magnetic field to a temperature of 77 K

Synthesis and Properties of Bi-HTSC synthesized on the basis of precursors obtained by melt quenching

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