Conductance fluctuations in high temperature critical superconducting system based on Bi2Sr1.4(Pb)0.6Ca2-xYxCu3 O10+y. thick films

21st Latin American Symposium on Solid State Physics

Saldarriaga, W.^1 ; Castro, W.^2 ; Baca, E.^3

Laboratorio de Materiales Cerámicos y Vítreos, Universidad Nacional de Colombia, Sede Medellín, A.A. 568, Medellín, Colombia^1

Proyecto Curricular de Ingeniería Topográfica, Universidad Distrital Francisco José de Caldas, A. A. 8668. Bogotá D. C, Colombia^2

Grupo de Ingeniería de Nuevos Materiales, Universidad Del Valle, A.A. 25360 Cali, Colombia^3

关键词: Annealing methods;    Concentration ranges;    Conductance fluctuation;    Electrical conductance;    High temperature;    Superconducting thick film;    Superconducting transitions;    Thermodynamic fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/480/1/012028/pdf
DOI  :  10.1088/1742-6596/480/1/012028

来源: IOP

【 摘 要 】

Bi2(Sr1.4)Pb0.6Ca2-xYxCu3O10+ysuperconducting thick films were prepared and deposited on MgO (100) substrates using a Melt-Quench-Annealing method (MQA).The superconducting transition was found around 89 K. Electrical conductance fluctuations and the thermodynamic fluctuations, close to Tc, were analyzed from results of R vs T measurements on the samples. Ytrium concentration range was in the range 0 ≤ x ≤ 0.8. Additionally, considering the Aslamazov-Larkin law, with Tc value fixed according to d2R/dT2criterion, the conductance trend in the samples was revealed. So, when x ≤ 0.075 a 3D behavior was found, on the other hand when the concentration increases to x 0.8 a 2D behavior is stabilized. From these characteristics a correlation to the structural properties of the sample can be inferred.