Effect of high valancy cations on the intergranular pinning energies of (Bi-Pb)(2)Sr2Ca2Cu3O10+delta samples
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Dosyalar
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In the present work, Bi-Pb-V-Sr-Ca-Cu-Ti-O bulk samples with nominal composition (BiPb)(2)VxSr2Ca3Cu4-y TiyO12+delta with x = 0.2 and y = 0.1, 0.2 and 0.3 compounds have been prepared by the melt-quenching method. The magnetoresistance of the samples has been measured for different values of the applied magnetic field. Using the resistivity data, the upper critical magnetic field H-c2(0) at T = 0 K was calculated. The coherence lengths at T = 0 K were calculated from H-c2(0) values. The thermally activated flux creep model has been studied in order to calculate the flux pinning energies. The results showed that H-c2(0) varied from 152.5 to 60.4 T and the flux pinning energies varied from 515 to 184 meV at 0 T, with the content y.
Açıklama
Anahtar Kelimeler
High-T-c Superconductors, Magnetoresistance, Pinning Energy, Upper Critical Magnetic Field, Coherence Length
Kaynak
Journal Of Superconductivity And Novel Magnetism
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
25
Sayı
6