Effect of High Valancy Cations on the Intergranular Pinning Energies of (Bi-Pb)(2)Sr2Ca2Cu3O10+delta Samples


Yazici D., Erdem M., ÖZÇELİK B.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.25, ss.1811-1816, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 25 Konu: 6
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1007/s10948-012-1555-8
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Sayfa Sayısı: ss.1811-1816

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.

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.