Vortex-glass phase transition and enhanced flux pinning in C4+-irradiated BaFe1.9Ni0.1As2superconducting single crystals

Shahbazi, Mahboobeh; Wang, Xiaotian; Ghorbani, Shaban Reza; Ionescu, Mihail; Shcherbakova, Olga V; Wells, Frederick S.; Pan, Alexey V.; Dou, Shi Xue; Choi, Ki Young

doi:10.1088/0953-2048/26/9/095014

Cited by 22 publications

(29 citation statements)

References 37 publications

(61 reference statements)

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“…In HTSCs, the resistive broadening is the consequence of thermal fluctuations in vortex matter. The glass transition temperature (T g ) has been calculated by using Vogel-Fulcher relation 24 and its value has been decreased from 93.13 K to 64.04 K for (CNTs) x -(CuTl-1223) composites with x = 0, and x = 7 wt.%, respectively.…”

Section: B Resistive Transitionmentioning

confidence: 99%

Infield superconductivity of carbon nanotubes-Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor composites

et al. 2015

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We investigated the infield superconducting properties of carbon nanotubes-Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor {(CNTs)x-(CuTl-1223)}; x = 0∼7 wt.% composites. The zero resistivity critical temperature {Tc(0)}, critical superconducting onset transition temperature {Tconset(K)} and glass transition temperature (Tg) have been shifted towards lower values after the addition of carbon nanotubes (CNTs). The double transitions for all concentration of CNTs have indicated the existence of vortex-glass phase. The significant resistive broadening {ΔT = Tconset(K)-Tc(0)} has been observed with increasing values of external applied magnetic field. The more increasing trend in resistive broadening has also been observed after the addition of CNTs in CuTl-1223 matrix. The magnetic field dependent activation energy Uo (H) has been calculated according to thermally activated flux flow (TAFF) model. The overall decreasing rate in pinning energy could be due to diffusion of carbon across the grain-boundaries.

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Section: B Resistive Transitionmentioning

confidence: 99%

Infield superconductivity of carbon nanotubes-Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor composites

et al. 2015

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“…Therefore, it is important to pin vortices in order to maintain the nondissipative transport current. The pinning of these vortices can be achieved either by natural pinning centers such as imperfections, defects, and grain boundaries, or by artificial pinning centers represented in the form of chemical doping, neutron irradiation, and heavy ion irradiation [4][5][6]. The straightforward novel technique to enhance flux pinning is achieved by adding nanoparticles of different weight percentages into HTSC matrix.…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistivity studies for BiPb-2223 phase added by BaSnO3 nanoparticles

Barakat

Habanjar

2017

J Adv Ceram

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Co-precipitation method and conventional solid-state reaction technique were used to synthesize BaSnO 3 nanoparticles and (BaSnO 3 ) x /Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10+δ (0 ≤ x ≤ 1.50 wt%) samples, respectively. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and electrical resistivity data were used to characterize BiPb-2223 phase added by BaSnO 3 nanoparticles. The relative volume fraction and superconducting transition temperature T c of BiPb-2223 phase were enhanced by increasing BaSnO 3 addition up to 0.50 wt%. These parameters were decreased with further increase of x. The resistive transition broadening under different applied DC magnetic fields (0.29-4.40 kG) was analyzed through thermally activated flux creep (TAFC) model and Ambegaokar-Halperin (AH) theory. Improvements of the derived flux pinning energy U, critical current density J c (0) estimated from AH parameter C(B), and upper critical magnetic field c2 (0) B , were recorded by adding BaSnO 3 nanoparticles up to 0.50 wt%, beyond which these parameters were suppressed. The magnetic field dependence of the flux pinning energy and critical current density decreased as a power-law relation, which indicated the single junction sensitivity between the superconducting grains to the applied magnetic field. Furthermore, the increase in the applied magnetic field did not affect the electronic thermal conductivity e  above the superconducting transition temperature and suppressed it below T c .

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“…INTRODUCTION G LASS-LIKE distributions of vortices in type II superconductors have been a subject of intense interest in recent years [1], [2], in both the two-dimensional (thin film) [3] and three dimensional (bulk) [4] cases.…”

mentioning

confidence: 99%

“…Most studies into vortex glass behaviour involve measurement or simulation of macroscopic quantities such as transport current and sample magnetisation to determine transitions in the vortex phase diagram [3], [4]. Analyses of the properties of vortex glass states by direct measurement are less common, but may provide a more fundamental understanding of the nature of these distributions of vortices [5].…”

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confidence: 99%

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Direct Measurements of Field-Dependent Ordering in a Low-Field Vortex Glass State

Wells

Pan

Wang³

et al. 2016

IEEE Trans. Appl. Supercond.

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The variation of topological defect density and hexatic order parameter were measured over a range of microTesla fields in a 2-D superconducting vortex glass. This was achieved through scanning SQUID microscopy of the vortex distribution in YBa2Cu3O7−δ thin films under field-cooled conditions. It was discovered that, although the defect density decreased for increasing magnetic fields, giving the impression of a more latticelike vortex distribution, the hexatic order parameter also decreased, showing that the distribution was less orientationally ordered. Abstract-The variation of topological defect density and hexatic order parameter were measured over a range of microTesla fields in a two-dimensional superconducting vortex glass. This was achieved through scanning SQUID microscopy of the vortex distribution in YBa2Cu3O 7−δ thin films under fieldcooled conditions. It was discovered that while the defect density decreased for increasing magnetic fields, giving the impression of a more lattice-like vortex distribution, the hexatic order parameter also decreased, showing that the distribution was less orientationally ordered.

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Vortex-glass phase transition and enhanced flux pinning in C⁴⁺-irradiated BaFe_1.9Ni_0.1As₂superconducting single crystals

Cited by 22 publications

References 37 publications

Infield superconductivity of carbon nanotubes-Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor composites

Infield superconductivity of carbon nanotubes-Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor composites

Magnetoresistivity studies for BiPb-2223 phase added by BaSnO3 nanoparticles

Direct Measurements of Field-Dependent Ordering in a Low-Field Vortex Glass State

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