Isotropic pinning in heavily Pb-doped Bi-2212/Ag tapes

Funahashi, Ryoji; Matsubara, Ichiro; Ueno, K.; Mizuno, Katsunori

doi:10.1016/s0921-4534(99)00237-3

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…This optimal phase combination has been obtained for 0.33 effective Pb substitution [15]. Contrarily to the results obtained for single crystals, limited success is obtained in bulk and tape systems with this cationic doping [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pb doping on the electrical properties of textured Bi-2212 superconductors

Sotelo

Rasekh

Constantinescu

et al. 2014

Journal of the European Ceramic Society

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Bi 2-x Pb x Sr 2 CaCu 2 O y textured materials (x=0.0, 0.2, 0.4, and 0.6) have been successfully prepared by the laser floating zone technique. Microstructure and electrical properties (J C and T C ) have been clearly affected by Pb addition. From the E-I curves, slope of the transition between the superconducting and the normal state (n) at 77 K reaches a maximum of about 16 for the 0.4 Pb doped samples. This value is much higher than the typical ones for the Bi-2212 materials. Moreover, when the electrical properties of the 0.4 Pb doped samples are measured at lower temperatures (between 65 and 77 K), n values increase when the temperature is decreased. A maximum n value of 32 has been reached at 65 K which makes this material very attractive for its use as resistive fault current limiters.

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Section: Introductionmentioning

confidence: 99%

Effect of Pb doping on the electrical properties of textured Bi-2212 superconductors

Sotelo

Rasekh

Constantinescu

et al. 2014

Journal of the European Ceramic Society

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“…This optimal phase combination has been obtained for an effective Pb substitution of 0.33 [20]. These promising results obtained in single crystals have not been successfully achieved in polycrystalline systems, as bulk and tapes, with this doping [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Textured Pb-Doped Bi-2212 Superconductors for Current Limiters

Sotelo

Rasekh

Amaveda

et al. 2014

J Supercond Nov Magn

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Bi 2-x Pb x Sr 2 CaCu 2 O y (x=0.0, 0.3, 0.4, and 0.5) textured materials have been prepared by the laser floating zone technique. The E-I curves showed and increase of the slope of the normal to superconducting transition with Pb addition. The best values have been obtained for the 0.4 Pb doped samples, around 16 at 77 K. In spite of this improvement, Pb addition decreased J C and T C in all cases. On the other hand, electrical characterization at lower temperatures has led to an impressive raise in the 0.4 Pb doped samples, reaching n values around 31, and J C of about 3000 A/cm 2 , at 65 K. At the same time, the mechanical integrity of the vitreous precursor materials has been determined. All the obtained results clearly indicate that these precursors when properly processed by the laser floating technique are promising candidates for practical applications as current limiters.

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“…This optimal phases combination has been obtained for 0.33 effective Pb substitution 10 . Contrarily to the results obtained for single crystals, limited success is obtained in bulk and tape systems with this cationic doping [13][14][15] . The aim of this work is to study the influence of Pb doping on the sharpness of the superconducting to normal transition on the E-I curves in LFZ textured Bi-2212 thin bars.…”

Section: Introductionmentioning

confidence: 99%

Variación de las curvas E-I en la transición normal superconductor de cerámicas texturadas BI-2212 por adición de PB

Amaveda¹,

Mora²,

Moñux³

et al. 2006

Bol. Soc. Esp. Ceram. Vidr.

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Vitreous cylinders with compositions Bi 2-x Pb x Sr 2 CaCu 2 O y , (x = 0, 0.2, 0.4 and 0.6) were prepared and used as precursors to fabricate textured bars through a laser floating zone melting method (LFZ). The resulting textured cylindrical bars were annealed, followed by their electrical characterization. The microstructure was determined and correlated with the electrical measured properties. The influence of Pb doping on the sharpness of the superconducting to normal transition on the E-I curves has been determined. The sharpest transitions have been obtained for samples doped with 0.4Pb.Keywords: Bi-2212, superconductivity, electrical properties, Pb. Variación de las curvas E-I en la transición normal superconductor de cerámicas texturadas BI-2212 por adición de PB.Se han preparado precursores de tipo vítreo en forma de cilindro con composiciones nominales Bi 2-x Pb x Sr 2 CaCu 2 O y , con x = 0, 0.2, 0.4 y 0.6. Estos cilindros se han utilizado como precursores para fabricar barras texturadas por medio de una técnica de fusión zonal inducida por láser (LFZ). Estas barras texturadas se recocieron a diferentes temperaturas y se caracterizaron eléctricamente. Además, se examinó su microestructura para correlacionarla con las propiedades eléctricas medidas. La variación de la transición del estado superconductor al normal se ha relacionado con el dopaje con Pb a través de las curvas E-I. Las mejores transiciones se han obtenido para muestras dopadas con 0.4 Pb.. Bi-2212, superconductividad, propiedades eléctricas, Pb. Palabras clave:

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Isotropic pinning in heavily Pb-doped Bi-2212/Ag tapes

Cited by 7 publications

References 22 publications

Effect of Pb doping on the electrical properties of textured Bi-2212 superconductors

Effect of Pb doping on the electrical properties of textured Bi-2212 superconductors

Textured Pb-Doped Bi-2212 Superconductors for Current Limiters

Variación de las curvas E-I en la transición normal superconductor de cerámicas texturadas BI-2212 por adición de PB

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