Investigation of Temperature Dependence of the Irreversibility Line of GdBa 2 Cu 3 O7−δ Added with Nanosized Ferrite ZnFe 2 O 4

Awad, R.; Roumié, M.; Isber, S.; Marhaba, Salem; Abou‐Aly, A. I.; Basma, H.

doi:10.1007/s10948-014-2752-4

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…where α j , ɣ are material constants [68]. The ɣ-value characterizes the homogeneity of superconductors and is called the index of transition [69].…”

Section: Electrical Resistivity Measurementsmentioning

confidence: 99%

Investigation of the structural and electrical properties of CdO/(Bi, Pb)−2212 superconducting phase

et al. 2022

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This investigation reports the effect of the addition of CdO nanoparticles on the (Bi,Pb)-2212 superconducting phase. The superconducting samples of general formula (CdO)x Bi1.6 Pb0.4 Sr1.9 Ca1.1Cu2.1 O8 (x = 0.00, 0.01, 0.02, 0.05, and 0.1 wt%) are synthesized using the conventional solid-state reaction technique. Powder X ray diffraction analysis confirms the formation of a single-phase orthorhombic Bi-2212. The variations in the lattice parameters are explained based on the Jahn Teller distortion induced by the increase in the oxygen content owing to the addition of the CdO nanoparticles. The increase in the oxygen content is confirmed via Idiometric titration analysis. The grain morphology is investigated using scanning electron microscopy (SEM). The effect of CdO addition in enhancing grains connectivity by the filing of pores and voids is revealed. Fourier transform infrared (FTIR) spectroscopy is conducted to analyze the functional groups, based on the effect of calcination temperature and CdO addition. Dc-electrical resistivity measurements and I-V characteristics show an enhancement of the superconducting transition temperature (Tc) and the critical current density (Jc) with CdO addition up to x=0.05 wt%, followed by a further decrease. By analyzing the results of the X-ray photoelectron spectroscopy (XPS), the variations of the superconducting properties are explained based on the preferred substitution of Pb2+ ions in the Bi3+ or Cu2+ sites induced by the variations in the oxygen content generated by the addition of CdO nanoparticles.

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“…where α j , ɣ are material constants [68]. The ɣ-value characterizes the homogeneity of superconductors and is called the index of transition [69].…”

Section: Electrical Resistivity Measurementsmentioning

confidence: 99%

Investigation of the structural and electrical properties of CdO/(Bi, Pb)−2212 superconducting phase

et al. 2022

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“…Nanosized ZnFe 2 O 4 and CoFe 2 O 4 powder were prepared by chemical Co-precipitation method as discussed in previous work [26] [27]. Superconducting samples of type (ZnFe 2 O 4 ) x GdBa 2 Cu 3 O 7−δ and (CoFe 2 O 4 ) x GdBa 2 Cu 3 O 7−δ , 0.0 ≤ x ≤ 0.4 wt%, were prepared by the conventional solid-state reaction technique.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Ion Beam Analysis and Electric Properties of GdBa2Cu3O7-δ Added with Nanosized Ferrites ZnFe2O4 and CoFe2O4

Basma¹,

Roumié²,

Awad³

et al. 2015

MSA

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In this study, superconducting samples of type GdBa2Cu3O7−δ added with x wt% (0 ≤ x ≤ 0.4) nanoferrites ZnFe2O4 and CoFe2O4 were prepared by the conventional solid-state reaction technique. The prepared samples were characterized using X-ray powder diffraction (XRD) in order to determine the volume fraction and lattice parameters. The elemental contents of the prepared samples were determined using particle induced X-ray emission (PIXE). In addition, the oxygen-content of these samples was obtained using non-Rutherford backscattering spectroscopy (RBS) at 3 MeV proton beam. It is found that the Oxygen-content of GdBa2Cu3O7−δ phase remains practically constant for low additions of both nanoferrites but it increases with high additions. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T0). An increase in the superconducting transition temperature Tc and the critical current density Jc is observed as x varies from 0.0 to 0.06 wt% of (ZnFe2O4)xGdBa2Cu3O7−δ, followed by a systematic decrease with increasing x. On the other hand, the Tc values for (CoFe2O4)xGdBa2Cu3O7−δ show a systematic decrease with x for both high and low additions while Jc is enhanced up to x = 0.01 wt% and decrease with further increase in x.

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Structural, electrical and mechanical properties of the (NdFeO3)x/(CuTl)-1223 superconductor phase

et al. 2023

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Investigation of Temperature Dependence of the Irreversibility Line of GdBa 2 Cu 3 O7−δ Added with Nanosized Ferrite ZnFe 2 O 4

Cited by 10 publications

References 23 publications

Investigation of the structural and electrical properties of CdO/(Bi, Pb)−2212 superconducting phase

Investigation of the structural and electrical properties of CdO/(Bi, Pb)−2212 superconducting phase

Ion Beam Analysis and Electric Properties of GdBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> Added with Nanosized Ferrites ZnFe<SUB>2</SUB>O<SUB>4</SUB> and CoFe<SUB>2</SUB>O<SUB>4</SUB>

Structural, electrical and mechanical properties of the (NdFeO3)x/(CuTl)-1223 superconductor phase

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Investigation of Temperature Dependence of the Irreversibility Line of GdBa 2 Cu 3 O7−δ Added with Nanosized Ferrite ZnFe 2 O 4

Cited by 10 publications

References 23 publications

Investigation of the structural and electrical properties of CdO/(Bi, Pb)−2212 superconducting phase

Investigation of the structural and electrical properties of CdO/(Bi, Pb)−2212 superconducting phase

Ion Beam Analysis and Electric Properties of GdBa&lt;SUB&gt;2&lt;/SUB&gt;Cu&lt;SUB&gt;3&lt;/SUB&gt;O&lt;SUB&gt;7-δ&lt;/SUB&gt; Added with Nanosized Ferrites ZnFe&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;4&lt;/SUB&gt; and CoFe&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;4&lt;/SUB&gt;

Structural, electrical and mechanical properties of the (NdFeO3)x/(CuTl)-1223 superconductor phase

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Ion Beam Analysis and Electric Properties of GdBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> Added with Nanosized Ferrites ZnFe<SUB>2</SUB>O<SUB>4</SUB> and CoFe<SUB>2</SUB>O<SUB>4</SUB>