A new Y-based HTSC with Tc above 100K

Aliabadi, A.; Farshchi, Y. Akhavan; Akhavan, M.

doi:10.1016/j.physc.2009.09.003

Cited by 114 publications

(63 citation statements)

References 11 publications

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“…[5][6][7][8][9][10]. A recently synthesized new Y-based HTS, Y 3 Ba 5 Cu 8 O 18 (Y358), exhibited superconductivity above 100 K [11]. In the previous studies of our group, several types of substitution studies were also done to improve the desired high-T c phase [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

Akyüz

Kocabaş

Yıldız

et al. 2011

J Supercond Nov Magn

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In this study, the effects of partial Sb 3+ ion substitutions for the Y sites and the Cu sites on the superconducting properties of YBa 2 Cu 3 O y (Y123) ceramic superconductors were investigated. The samples were prepared by the conventional solid-state reaction method and the properties of the samples were investigated by means of X-ray diffraction, AC magnetic susceptibility measurements, scanning electron microscope, and energy dispersive X-ray analysis. The critical temperatures were determined to be in the range of 80-92 K for both Systems I and II. It was found that Sb-addition leads to the formation of the non-superconducting YBa 2 SbO 6 phase, which has a negative effect on the critical temperature, since the highest critical temperature was measured for pure Y123. However, the increasing substitution level has a negligible effect on the X-ray diffraction analysis peak intensities of the superconducting phases. In addition, SEM images showed that Sb substitution decreases the grain size and modifies the microstructure development, which makes the samples denser.

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Section: Introductionmentioning

confidence: 99%

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

Akyüz

Kocabaş

Yıldız

et al. 2011

J Supercond Nov Magn

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“…There are only a few models concerning the linear temperature dependence of the electrical resistivity of the HTSCs. One may exclude boson-boson and boson-phonon scatterings which are responsible for linear resistivity behavior at high and low temperatures, respectively [61]. Despite the polycrystalline nature of our samples, the data of electrical resistivity are analyzed using bipolaron model.…”

Section: Characterization and Investigationmentioning

confidence: 99%

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

et al. 2016

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Abstract:The effect of the partial substitution of Ca 2+ by Ho 3+ ions on the electrical and mechanical properties of the superconducting phase (Bi,Pb)-2223 was studied. Superconducting samples of the type (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ were prepared by solid-state reaction technique under ambient pressure, and characterized by means of X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The superconducting transition temperature T c and pseudogap temperature T * were estimated from electrical resistivity measurements, while the critical current density J c was determined from I-V curves. The electrical resistivity data were discussed according to bipolaron model in the absence of thermally excited individual polarons. The sample with x = 0.025 showed the highest phase volume fraction, T c , and J c . Room temperature Vickers microhardness measurements were carried out at different applied loads (0.25-5 N) in order to investigate the performance of the mechanical properties of (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ phase. It was found that all the samples exhibit normal indentation size effect (ISE). The Vickers microhardness number H V increased as x increased from 0 to 0.025. The experimental results were discussed in view of Meyer's law, Hays-Kendall (HK) approach, elastic/plastic deformation (EPD) model, and proportional specimen resistance (PSR) model. The load independent (true) microhardness of (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ superconducting samples showed identical behavior to that of the PSR model.

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“…In 2009, the Y 3 Ba 5 Cu 8 O 18 (Y358) was found (Alibadi et al, 2009). This is the highest critical temperature of Y-based superconductor that has highest critical temperature at 102K.…”

Section: Introductionmentioning

confidence: 97%

Electrical properties and crystal structure of Y123, Y358 and Y257/Y211 composite bulk superconductors

Kruaehong¹

2014

Int. J. Phys. Sci.

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The Y123, Y358 and Y257 bulk superconductors mixed with various ratio of non-superconducting Y211 (Y 2 BaCuO 5 ) were synthesized by solid state reaction. The physical properties of pellets were investigated by d.c. four-probes measurement. The crystal structure was determined using powder X-ray diffraction and the characteristic peaks were determined using the Rietveld full-profile analysis method. Results showed that the T c onset and T c offset decreased with the increasing of Y211 doping. The samples consist of both superconducting phase and the non-superconducting phase. The lattice parameter of Y211 doped samples showed lower c direction than pure samples. The superconducting phase decreased with increasing Y211 content. The non-superconducting phases consists of Pccm (Ba 2 Cu 3 O 6) and Im-3m (BaCuO 2 ) respectively. According to the percentage of superconducting phase, the anisotropy increased with Y211 contents.

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A new Y-based HTSC with Tc above 100K

Cited by 114 publications

References 11 publications

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

Electrical properties and crystal structure of Y123, Y358 and Y257/Y211 composite bulk superconductors

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