Structural and physical properties of Cd-doped Bi1.64Pb0.36Sr2Ca2−xCdxCu3Oy superconductor

Ghahfarokhi, S. E. Mousavi; Shoushtari, Morteza Zargar

doi:10.1016/j.physb.2010.08.053

Cited by 69 publications

(20 citation statements)

References 28 publications

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“…The Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10 (Bi-2223) high temperature superconductor have shown great promise for commercialization to be used in various applications due to its potential of carrying high current [1][2]. However, the weak pinning force of flux lines suppresses the transport current density in applied magnetic fields and high temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanosized Co0.5Ni0.5Fe2O4 on the transport critical current density of Bi1.6Pb0.4Sr2Ca2Cu3O10 superconductor

Hafiz¹,

Abd‐Shukor²

2014

AIP Conference Proceedings

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Abstract. The effects of nano-sized Co 0.5 Ni 0.5 Fe 2 O 4 addition on the superconducting and transport properties of Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10 (Bi-2223) in bulk form has been investigated. Bi-2223 superconductor was fabricated using coprecipitation method and 0.01 -0.05 wt% of Co 0.5 Ni 0.5 Fe 2 O 4 nanoparticles with average size of 20 nm were added into the samples. The critical temperature (T c ) and critical current density (J c ) of the samples were measured by using the four-point probe method, while the phase formation and microstructure of the samples were examined using x-ray diffraction and SEM respectively. It was found that J c of all samples added with Co 0.5 Ni 0.5 Fe 2 O 4 were higher than nonadded sample, with x = 0.01 wt. % sample showing the highest J c . This study showed that small addition of nanoCo 0.5 Ni 0.5 Fe 2 O 4 can effectively enhance the transport critical current density in Bi-2223 superconductor.

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Section: Introductionmentioning

confidence: 99%

Effect of nanosized Co0.5Ni0.5Fe2O4 on the transport critical current density of Bi1.6Pb0.4Sr2Ca2Cu3O10 superconductor

Hafiz¹,

Abd‐Shukor²

2014

AIP Conference Proceedings

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“…Moreover, in the literature there have been several reports relating to BSCCO films for high frequency applications including filters, antennas and magnetic shield devices [14][15][16][17]. This family has three different phases with regard to chemical compositions: the Bi-2201 phase with T c of ≈ 20 K, Bi-2212 phase with T c of ≈ 85 K and Bi-2223 phase with T c of ≈ 110 K [18]. In these phases, Bi-2212 consisting of the double layered cuprate obtains more advantageous than the others in terms of the relatively invariant of the oxygen stoichiometry with respective to cationic doping, lesser weak link problems and better thermodynamic stability [19,20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnetic Field Direction on Magnetoresistivity, Activation Energy, Irreversibility and Upper Critical Field of Bi-2212 Thin Film Fabricated by DC Sputtering Method

Bal

Varılcı

2012

J Supercond Nov Magn

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This study aims to investigate the effect of magnetic field direction on superconducting properties of Bi-2212 thin film fabricated on MgO (100) substrate using the direct current (DC) magnetron reactive sputtering technique at 100 watt with the aid of magnetoresistivity measurements. The zero resistivity transition temperatures (T c ), irreversibility fields (μ 0 H irr ) and upper critical fields (μ 0 H c2 ) are deduced from the magnetoresistivity versus temperature curves under DC magnetic fields (parallel and perpendicular to c-axis) up to 5 T. Moreover, thermally activated flux flow (TAFF) model is studied for activation energy (U 0 ) values of the sample. It is found that the T c value decreases from 76.4 K to 39.1 K for the applied magnetic field perpendicular to c-axis (μ 0 H ⊥c-axis); likewise, the T c reduces towards 28.8 K with the increase in the applied field parallel to c-axis (μ 0 H c-axis). Furthermore, the U 0 values are found to decrease considerably with increasing applied magnetic field. In fact, the U 0 of 134.5 K is obtained to be smallest at 5 T field parallel to the c-axis. Additionally, both the μ 0 H irr and μ 0 H c2 values determined are also observed to reduce with the increase of the applied magnetic field. At absolute zero temperature (T = 0 K), the extrapolation of the μ 0 H irr (T ) and μ 0 H c2 (T ) curves is used to obtain the μ 0 H irr (0) and μ 0 H c2 (0) values of the film, respectively. The inner is found to be about 22.216 T (19.046 T) for the applied field perpendicular (parallel) to c-axis whereas the latter is determined to be about 54.095 T (126.522 T) for the applied field parallel (perpendicular) to c-axis, respectively, as a result of anisotropic behavior of the film prepared. On the other hand, penetration depths (λ) and coherence lengths (ξ ) inferred from μ 0 H irr (0) and μ 0 H c2 (0) values are obtained to be about 38.519 Å (41.601 Å) and 16.147 Å (24.685 Å) in the case of applied field perpendicular (parallel) to c-axis, respectively. Based on all the results, the change of the superconducting properties as a function of the magnetic field direction presents the anisotropy of the sample produced. X-ray diffraction (XRD) and scanning electron microscopy (SEM) examinations are also conducted for microstructural and phase analyses of the film.

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“…Bi-Sr-Ca-Cu-O (BSCCO) system composed of a layered structure has three different phases in terms of its chemical compositions, the Bi-2201 phase (n = 1, T c ≈ 20 K), Bi-2212 phase (n = 2, T c ≈ 85 K) and Bi-2223 phase (n = 3, T ≈ 110 K) [23]. In these series, the doublelayered perovskite cuprate (Bi-2212) is superior to the others due to the fact that its oxygen stoichiometry is relatively invariant with regard to cationic addition when the samples are produced in an identical thermal environment [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing Time and Temperature on Microstructural and Superconducting Properties of (Bi,Pb)-2212 Thin Films Produced by Magnetron Reactive Sputtering

Bal

Varılcı

2012

J Supercond Nov Magn

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This study deals with the role of various annealing time (1 h, 2 h, 4 h, 6 h and 8 h) and temperature (840 and 850°C) on the microstructural and superconducting properties of thin films with the aid of scanning electron microscopy (SEM), X-Ray analysis (XRD), electron dispersive X-Ray (EDX), resistivity and transport critical current density (J c ) measurements. The T c , J c , variation of transition temperatures, hole-carrier concentration, grain size, phase purity, lattice parameter, surface morphology, element distribution, crystallinity and resistivity (at room temperature) values of the films prepared are compared with each other. Critical transition temperatures (T c ) of the samples are deduced from the dc resistivity measurement while critical current density values are estimated from the critical current and total cross-sectional area values. It is found that maximum T c of 79.7 K and J c of 1520 A/cm 2 are observed for the film annealed at 840°C for 6 h as against 54.9 K and 30 A/cm 2 (minimum values), respectively, for the film annealed at 840°C for 4 h. Moreover, SEM images indicate that the former has the best crystallinity, grain connectivity and largest grain size. Based on these results, T c and J c values of the samples studied are found to depend strongly on the microstructure. Additionally, EDX results show that the elements used for the preparation of all the samples are observed to distribute homogeneously. As for the XRD results, all the samples exhibit the polycrystalline superconducting phase with the changing intensity This study is devoted to Gulnur Ozdemir on the occasion of her 26th Birthday. of diffraction lines. According to the refinement of cell parameters done by considering the structural modulation, the largest lattice parameter a and c are obtained for the film annealed at 840°C for 8 h. To sum up, the aim of the present study is not only to investigate the changes of microstructural and superconducting properties of the samples fabricated in the varied time and temperature but to determine the best ambient for the film fabrication and show the feasibility of obtaining Bi-2212 film with tailored structure, as well.

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Structural and physical properties of Cd-doped Bi1.64Pb0.36Sr2Ca2−xCdxCu3Oy superconductor

Cited by 69 publications

References 28 publications

Effect of nanosized Co0.5Ni0.5Fe2O4 on the transport critical current density of Bi1.6Pb0.4Sr2Ca2Cu3O10 superconductor

Effect of nanosized Co0.5Ni0.5Fe2O4 on the transport critical current density of Bi1.6Pb0.4Sr2Ca2Cu3O10 superconductor

Effect of Magnetic Field Direction on Magnetoresistivity, Activation Energy, Irreversibility and Upper Critical Field of Bi-2212 Thin Film Fabricated by DC Sputtering Method

Effect of Annealing Time and Temperature on Microstructural and Superconducting Properties of (Bi,Pb)-2212 Thin Films Produced by Magnetron Reactive Sputtering

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