Temperature-dependent scaling of pinning force data in Bi-based high-Tc superconductors

Koblischka, Michael Rudolf; Sosnowski, J.

doi:10.1140/epjb/e2005-00126-3

Cited by 28 publications

(13 citation statements)

References 25 publications

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“…(12). The shape of this curve is in agreement with experimental data [10] measured on Bi-2223 tapes.…”

Section: Comparison Of the Model Of The Pinning Interaction With Expesupporting

confidence: 90%

“…(12), predicts the shift of the maximal value of the pinning force with temperature, which was observed experimentally in [10]. The presented model allows to explain also the dynamic anomalies of the current-voltage characteristics of the HTc ceramics observed by us previously [11] and shown in Fig.…”

Section: Comparison Of the Model Of The Pinning Interaction With Expesupporting

confidence: 66%

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Influence of the Flux Pinning on Critical Current in HTc Superconductors with Nano-Sized Defects

Sosnowski¹

2011

TONANOJ

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Performed analysis of the flux pinning on nano-sized centers, allowed to receive new results on the critical current problems in the high temperature oxide superconductors. A new model of the interaction pancake vortices with the nano-sized centers is proposed and comparison of obtained results with others pinning forces approaches is presented. The energy balance approach is applied, which leads to the appearance of the potential barrier determining the pancake vortices movement in the flux creep process. Various initial positions of the captured vortex have been analyzed and variation of the screening currents for these configurations has been considered. Initial calculations of the influence of this effect on the current-voltage characteristics have been performed. The dependence of the critical current on the pinning centers parameters has been determined, as well as comparison with the experimental data presented. Pinning force has been calculated and its temperature dependence, which is in qualitative agreement with experiments. The critical current determines the magnetic induction profiles and therefore also flux trapping, very important parameter from the point of view of application HTc superconductors as permanent magnets. The influence of the critical current and granular structure parameters on the flux trapping in ceramic superconductors is regarded. The influence of the critical current on a.c. losses in second generation HTc tapes with magnetic substrate is briefly discussed too.

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“…(12). The shape of this curve is in agreement with experimental data [10] measured on Bi-2223 tapes.…”

Section: Comparison Of the Model Of The Pinning Interaction With Expesupporting

confidence: 90%

Section: Comparison Of the Model Of The Pinning Interaction With Expesupporting

confidence: 66%

Influence of the Flux Pinning on Critical Current in HTc Superconductors with Nano-Sized Defects

Sosnowski¹

2011

TONANOJ

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“…The irreversibility field, H irr , of the nanowire network sample and its temperature dependence are comparable to those of filaments extracted from Bi-2212/Bi-2223 tape samples [48,49], even though the grains within an individual nanowire do not exhibit a texture as seen from the TEM images. This indicates a proper formation of the Bi-2212 phase within our nanowire samples.…”

Section: Discussionmentioning

confidence: 63%

Analysis of magnetization loops of electrospun nonwoven superconducting fabrics

Zeng

Karwoth

Koblischka

et al. 2017

Phys. Rev. Materials

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Networks of superconducting Bi 2 Sr 2 CaCu 2 O 8 (Bi-2212) nanowires were fabricated by the electrospinning technique. The nanowires have a diameter of the order of 150-200 nm and lengths up to the micrometer range and form a nonwoven, fabric-like network with numerous interconnections enabling a current flow between the nanowires. The porosity of this nanowire network is 0.9928. Therefore, this material represents a novel class of ultraporous high-temperature superconductors. The magnetizations of the nanowire networks [M(T ) and M(H )] were recorded by SQUID magnetometry. The magnetic properties were analyzed using the extended critical state model (ECSM). It is supposed that the averaged diameter of the nanowires rules the magnetic field dependence of the critical current density of the nanowire network. Single nanowires have remarkably high values of the critical current density of 1.04 × 10 7 A/cm 2 at 5 K. The macroscopic critical current density less than ∼0.05 A/cm

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“…20 By means of the fitting, the critical temperature is determined to be 74.4 K, corresponding to the result from the M(T) curve (see Fig. 2).…”

Section: Resultsmentioning

confidence: 97%

Magnetic properties of electrospun non-woven superconducting fabrics

et al. 2016

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Non-woven superconducting fabrics were prepared by the electrospinning technique, consisting of Bi2Sr2CaCuO8 (Bi-2212) nanowires. The individual nanowires have a diameter of ∼150-200 nm and lengths of up to 100 μm. A non-woven fabric forming a network with a large number of interconnects results, which enables the flow of transport currents through the entire network. We present here magnetization data [M(T) and M(H)-loops] of this new class of superconducting material. The magnetic properties of these nanowire networks are discussed including the irreversibility line and effects of different field sweep rates, regarding the microstructure of the nanowire networks investigated by electron microscopy.

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Temperature-dependent scaling of pinning force data in Bi-based high-Tc superconductors

Cited by 28 publications

References 25 publications

Influence of the Flux Pinning on Critical Current in HTc Superconductors with Nano-Sized Defects

Influence of the Flux Pinning on Critical Current in HTc Superconductors with Nano-Sized Defects

Analysis of magnetization loops of electrospun nonwoven superconducting fabrics

Magnetic properties of electrospun non-woven superconducting fabrics

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