Influence of annealing on the critical temperature of Bi–Pb–Sr–Ca–Cu–O thin films

Díaz-Valdés, Elvia; Mejía‐García, C.; López-López, José Luis; Jergel, M.

doi:10.1007/s10854-007-9286-5

Cited by 3 publications

(1 citation statement)

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“…When growing the Bi-based films, many technological parameters are involved in such a process that influences the final properties of the synthesized films. In our previous studies we observed a loss of Pb during the annealing treatment [11]. This Pb-loss led to the transformation of the high-T c (2212 and 2223) phases to the low-T c (2201) phase or others no superconductor phases.…”

Section: Introductionmentioning

confidence: 82%

BPSCCO Superconducting Films Grown by Spray Pyrolysis Technique: Systematic Study of the Relationship between Pb Content and Annealing Conditions

Valdés¹,

García²,

Mercado³

et al. 2012

AMPC

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Actually recent investigation in developing semiconducting-superconducting composites based in CdS and Bi-based superconductors has attracted interest in processing thin superconducting films. In this work are reported Bi-Pb-Sr-Ca-Cu-O (BPSCCO) thin films grown on MgO substrates by spray pyrolysis technique from a solution containing Bi(NO 3) 3 , Pb(NO 3) 2 , Sr(NO 3) 2 , Ca(NO 3) 2 and Cu(NO 3) 2 , with a subsequent solid state reaction for growing the Bi-based superconducting phases. Annealed films were characterized by X-ray diffraction, atomic absorption spectroscopy and resistance measurements. Interdependence between Pb content, annealing time and temperature, in the formation of superconducting phases was studied applying a fractional factorial design 3 III 4-2. Interrelation between Pb content, t a and T a exists. The presence of Pb is necessary to stabilize the high-T c phase but its content depends on the annealing conditions.

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Section: Introductionmentioning

confidence: 82%