Effect of yttrium doping on magneto-transport properties of Bi(Pb)-2212 superconductors
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Dosyalar
Tarih
2013
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
An analysis of the temperature dependence of resistivity results under magnetic fields (0-7 T) is presented for yttrium doped Bi1.6Pb0.4Sr2Ca1-x Y (x) Cu2O8+delta and Bi1.6Pb0.4Sr2-x Y (x) CaCu2O8+delta (x=0 and 0.075) superconductors. The experimental methodology is mainly based on DC measurements in the range temperature of 10-300 K. The activation energy (U (0)) is calculated using the Arrhenius law (rho(T)=rho (0)exp(-U (0)/K (B) T)). The irreversibility fields (mu (0) H (irr)) and upper critical fields (mu (0) H (c2)) are extracted using the previously proposed methods. The study shows that the highest values of these parameters are seen for the doped sample at the Ca site, suggesting that the flux lines are effectively pinned in this compound when compared to the others. The calculated physical parameters such penetration depth (lambda(0)) and coherence length (xi(0)) are also in good agreement with values previously published for this phase. The upper critical field has a maximum value when the hole concentration per CuO2 unit (P) is around 0.179.
Açıklama
3rd International Conference on Superconductivity and Magnetism (ICSM) -- APR 29-MAY 04, 2012 -- Istanbul, TURKEY
Anahtar Kelimeler
Bi(Pb)-2212 Phase, TAFF Model, Activation Energy, Upper Critical Field
Kaynak
Journal Of Superconductivity And Novel Magnetism
WoS Q Değeri
Q3
Scopus Q Değeri
Cilt
26
Sayı
4
