Influence of Connectivity on Vortex-Dynamic Properties of Polycrystalline NdFeAsO0.88F0.12 Superconductors

Zhuang, J. C.; Sun, Yue; Ding, Yi; Yuan, Feifei; Jia, Xiaoyu; Shi, Zhixiang; Huang, He

doi:10.1007/s10909-012-0846-6

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…HTSs doping using different types of impurities (magnetic or nonmagnetic), as well as various fabrication and measurement conditions, have often been utilized to tune up their pinning properties. These studies have shown that grains connectivity and alignment influence not only J c , but also the pinning and, in turn, the materials relaxation behavior [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of magnetic relaxation behavior by texturing in Bi-2212 superconducting rods

Ozabaci

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Кират

et al. 2016

Ceramics International

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Time decay of magnetization, known as magnetic relaxation, is crucial for both fundamental and applied point of view in bulk high temperature superconductors (HTS) by setting the limits to the HTS devices stability. Melt-processed Bi 2 Sr 2 Ca 1 Cu 2-x Ga x O 8+δ rods (Bi-2212, x = 0, 0.1) were used to study the effect of both grain alignment and substitution on the samples critical current density, relaxation and pinning behavior. The magnetic field has been applied both perpendicular and parallel to the rods growth axis to determine the effect of grain alignment. It has been found that Ga substitution reduces grains orientation and sizes leading to lower magnetic properties. The peaks of the curves, which indicate the temperature dependence of the samples magnetic relaxation rate (S), have been observed in the 7-35 K temperature range. Characteristic pinning energy (U e /k B ) of samples was determined using the formalism developed by Maley. The change of pinning energy as a function of magnetization has been found to be exponential between 3 and 60 K, which is in agreement with the collective creep theory.

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Section: Introductionmentioning

confidence: 99%

Enhancement of magnetic relaxation behavior by texturing in Bi-2212 superconducting rods

Ozabaci

Kızılaslan

Кират

et al. 2016

Ceramics International

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Annealing Effect on Microstructure and Superconductivity of K $$_{x}$$ x Fe $$_{y}$$ y Se $$_{2}$$ 2 Synthesized by an Easy One-step Method

Zhou

et al. 2014

J Low Temp Phys

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High-quality superconducting K x Fe y Se 2 single crystals were synthesized using an easy one-step method.Detailed annealing studies were performed to make clear the phase formation process in K x Fe y Se 2 .Compatible observations were found in temperature-dependent X-ray diffraction patterns, back-scattered electron images and corresponding electromagnetic properties, which proved that good superconductivity performance was close related to the microstructure of superconducting component.Analysis based on the scaling behavior of flux pinning force indicated that the dominant pinning mechanism was ∆T c pinning and independent of connectivity. The annealing dynamics studies were also performed, which manifested that the humps in temperature-dependent resistance (RT) curves were induced by competition between the metallic/superconducting and the semiconducting/insulating phases.

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The Annealing Effects in the Iron-Based Superconductor FeTe0.8Se0.2 Prepared by the Self-Flux Method

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Özçelık

et al. 2014

J Supercond Nov Magn

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Influence of Connectivity on Vortex-Dynamic Properties of Polycrystalline NdFeAsO0.88F0.12 Superconductors

Cited by 4 publications

References 19 publications

Enhancement of magnetic relaxation behavior by texturing in Bi-2212 superconducting rods

Enhancement of magnetic relaxation behavior by texturing in Bi-2212 superconducting rods

Annealing Effect on Microstructure and Superconductivity of K $$_{x}$$ x Fe $$_{y}$$ y Se $$_{2}$$ 2 Synthesized by an Easy One-step Method

The Annealing Effects in the Iron-Based Superconductor FeTe0.8Se0.2 Prepared by the Self-Flux Method

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