Effect of Ti Doping on Structural and Superconducting Property of YBa2Cu3O7−y High T c Superconductor

Sahoo, Mrutyunjaya; Behera, D.

doi:10.1007/s10948-013-2269-2

Cited by 28 publications

(5 citation statements)

References 51 publications

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“…The critical exponent λ c achieves 0.2 in the 0.5 wt.% CoFe 2 O 4 -added Y-358 sample. The existence of such regimes of fluctuation conductivity characterized by a small exponent was reported in a YBa 2 Cu 3 O 7−d /CrO 2 composite [12], in TiO 2 -doped YBa 2 Cu 3 O 7−y [34], in the Y 0.95 Pr 0.05 Ba 2 Cu 3 O 7−d compound [35] and the Er 1−x Ce x Ba 2 Cu 3 O 7−d sample [36]. This value describes a critical scaling beyond 3D-XY-E and can be interpreted as revealing an ultimate weakly firstorder character of the normal superconducting transition in YBCO samples [36].…”

Section: Resultsmentioning

confidence: 66%

Excess Conductivity Study in Nano-CoFe2O4-Added YBa2Cu3O7−d and Y3Ba5Cu8O18±x Superconductors

Slimani

Hannachi

Salem

et al. 2015

J Supercond Nov Magn

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We report electrical conductivity fluctuation analyses on YBa 2 Cu 3 O 7−d (noted Y-123) and Y 3 Ba 5 Cu 8 O 18±x (noted Y-358) polycrystalline samples added with nano-sized ferrite cobalt (CoFe 2 O 4 ) particles. Phases and microstructure have been systematically investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD results reveal that the lattice parameters change for both Y-123 and Y-358 phases. SEM observations show that the grain size is reduced with increasing the content of CoFe 2 O 4 in the yttrium-based superconductor (YBCO) matrix The temperature dependence of electrical resistivity ρ(T ) has been measured and the effect of addition of magnetic CoFe 2 O 4 in the paraconductivity region has been reported. The thermodynamic fluctuation is obtained by analyzing the excess of conductivity on the basis of the Aslamazov-Larkin theory. The coherence length, the effective layer thickness, critical magnetic fields, and critical current density are estimated. Superconducting parameters are affected by the nanoparticle addition, and results are discussed in relevance to the structural and microstructure differences between Y-123 and Y-358.

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Section: Resultsmentioning

confidence: 66%

Excess Conductivity Study in Nano-CoFe2O4-Added YBa2Cu3O7−d and Y3Ba5Cu8O18±x Superconductors

Slimani

Hannachi

Salem

et al. 2015

J Supercond Nov Magn

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“…In this part, the variation of superconducting properties including the offset/onset transition temperatures (

T_{normalc}^{onset}

T_{normalc}^{offset}

), degree of broadening transitions (

Δ T_{normalc}

), and charge carrier (P) concentrations in the valence bands of perovskite‐based YBa 2 Cu 3 O 7‐y cuprate superconductors with the oxygen annealing ambient condition and different manganese impurity addition amount has been studied by means of the standard temperature‐dependent resistivity experiments exerted in the temperature range between 20 and 120 K. The observed parameters have numerically been depicted in Table 1 (including the experimental results for the pure and Mn‐added YBa 2 Cu 3 O 7‐y cuprate superconductors prepared without the oxygen ambient condition) and Table 2 (including the results for the YBa 2 Cu 3 O 7‐y superconductors produced under the oxygen ambient condition). The

T_{normalc}^{offset}

transition temperature is directly associated with the pairing mechanism or polaronic effect (electron–electron and electron–phonon interactions = formation of super‐electrons and cooper‐pairs) for antiferromagnetic spin fluctuations in the microdomain clusters of the YBa 2 Cu 3 O 7‐y system (Sahoo & Behera, 2014). Thus, the

T_{normalc}^{offset}

indicates the phase transition between the normal state and superconducting state for both the inter‐granular areas and transcrystalline regions in the isolated grains (Awad et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the superconductivity vanishes slowly and slowly. the following relation gives us to determine the change in the oxygen concentration levels in the unit cell for the Mn‐added YBa 2 Cu 3 O 7‐y superconductor (Sahoo & Behera, 2014):

y = 7 - \frac{c - 11.68}{0.1501}

…”

Section: Resultsmentioning

confidence: 99%

Support of polaronic states and charge carrier concentrations of YBa₂Cu₃O₇_‐y ceramics by oxygen and Mn₂O₃ impurity

Kurtul,

Yildirim,

Turgay

et al. 2024

Microscopy Res & Technique

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The influence of oxygen and Mn2O3 impurity addition intervals 0.01 ≤ x ≤ 0.30 on the basic electrical conductivity, stabilization, crystallinity quality, grain boundary couplings, structural, orbital hybridization mechanisms, and superconducting properties of YBa2Cu3O7‐yMnx ceramics has extensively been analyzed by electrical resistivity, X‐ray diffraction investigations, and related theoretical results. It has been found that there is a strong link between the production conditions and fundamental characteristic features. All the results deduced have enabled us to discuss the variation of electron–electron and electron–phonon interactions, order parameter for super‐electrons and cooper‐pairs, organization of Cu–O coordination, homogeneities of oxidation states, microscopic structural problems, electronic density states, and grain boundary couplings between the adjacent layers in the YBa2Cu3O7‐y ceramics. Similarly, we have discussed the change in the formation of pairing mechanisms and bipolarons in the polarizable lattices in the microdomain clusters. The results have shown that both the presence of oxygen and optimum manganese impurity of x = 0.07 led to the enhancement in the fundamental characteristic features related to the basic physical, quantum mechanical, and thermodynamics features. Thus, the material produced at the most ideal conditions has exhibited the best orthorhombic crystal structure with the distortion degree of 6.419 × 10−3, paring mechanism, and crystallinity quality due to the development of orthorhombicity and oxygen ordering degree. Namely, the addition of optimum manganese impurity has organized the Cu–O coordination and stabilized the crystal structure as much as possible. Numerically, the sample prepared with x = 0.07 Mn ions has displayed the largest crystallite size, c‐axis length, residual resistivity ratio, onset, and offset critical temperatures of 10.977, 11.723 Å, 73 nm, 98.320 K, and 100.504 K, respectively. Conversely, the same material has demonstrated the smallest oxygen ordering degree of 6.714, strain of 44.015 × 10−3, and a‐ and b‐axis lengths of 3.792 and 3.841 Å. On the other hand, the oxygen‐free annealing condition and excess manganese impurity have completely damaged the whole mechanism because of the phase transition from orthorhombic to tetragonal (structural O–T transition) crystal structure. To sum up, the oxygen and optimum manganese impurity have encouraged the YBa2Cu3O7‐y superconductors to use in much more application fields.Research Highlights The presence of oxygen and an optimal level of Mn2O3 impurity in YBa2Cu3O7‐y superconductors improved superconducting properties. The optimal level of Mn2O3 impurity promotes standard metallic characteristics. Ideal process conditions lead to the formation of super‐electrons and cooper‐pairs, expanding the superconducting energy gap. Optimal conditions lead to the expansion of orthorhombic distortion symmetry and average crystallite size. The excess manganese impurity results in a metal‐to‐insulator transition.

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“…The higher sintering temperature reduced the porosity on surface of samples. The various elements were added in YBaCuO system for increasing their properties such as critical temperature (T c ) and critical current density (J c ) [5][6][7] Sahoo and Behera [8] studied effect of Ti doping on structural and superconducting property of YBa 2 Cu 3 O 7−y high-Tc superconductor, YBaCuO. A series of samples of YBa 2 (Cu 1-x Ti x ) 3 O 7- (x=0, 0.01, 0.02, 0.04, 0.05, 0.07) had been prepared by the solid state reaction method.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti-Doped on Y134 Superconductor

Supadanaison

Panklang

Wanichayanan

et al. 2016

AMM

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We investigated some properties of Y134 superconductor doped Ti superconductor. The series of samples of Y134 doped Titanium (YBa3Cu4TixO9-δ) which x=0, 0.05, 0.10, 0.15, 0.20, 0.25 were prepared by solid state reaction method with calcinations and sintering temperature at 980 °C. The porosity was reduced and the melting area were found for all Ti-doped samples. There was a little effect of Ti-doped on Tc onset but the lower of Tc offset were found that agree with the melting found on surface of sample with Ti-doped. The peritectic temperature of Y134 powder, and Y134 + 0.10Ti were on the same range about with more peak area of pure Y134 than Y134 with Ti-doping.

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Effect of Ti Doping on Structural and Superconducting Property of YBa2Cu3O7−y High T c Superconductor

Cited by 28 publications

References 51 publications

Excess Conductivity Study in Nano-CoFe2O4-Added YBa2Cu3O7−d and Y3Ba5Cu8O18±x Superconductors

Excess Conductivity Study in Nano-CoFe2O4-Added YBa2Cu3O7−d and Y3Ba5Cu8O18±x Superconductors

Support of polaronic states and charge carrier concentrations of YBa₂Cu₃O₇_‐y ceramics by oxygen and Mn₂O₃ impurity

Effect of Ti-Doped on Y134 Superconductor

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Effect of Ti Doping on Structural and Superconducting Property of YBa2Cu3O7−y High T c Superconductor

Cited by 28 publications

References 51 publications

Excess Conductivity Study in Nano-CoFe2O4-Added YBa2Cu3O7−d and Y3Ba5Cu8O18±x Superconductors

Excess Conductivity Study in Nano-CoFe2O4-Added YBa2Cu3O7−d and Y3Ba5Cu8O18±x Superconductors

Support of polaronic states and charge carrier concentrations of YBa2Cu3O7‐y ceramics by oxygen and Mn2O3 impurity

Effect of Ti-Doped on Y134 Superconductor

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Support of polaronic states and charge carrier concentrations of YBa₂Cu₃O₇_‐y ceramics by oxygen and Mn₂O₃ impurity