AC susceptibility study of a multi-filamentary Bi-2212/Ag superconducting tape

Gencer A., Aksu E., Ozogul O., Yakinci M. E.

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, cilt.445, ss.772-776, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 445
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.physc.2006.05.084
  • Sayfa Sayıları: ss.772-776


Measurements of the in-phase (chi') and out-of-phase (chi'') components of the ac susceptibility for a multi-filamentary Bi-2212/Ag tape by the powder-in-tube (PIT) technique are presented as a function of temperature T = 20-90 K, in the frequency range 40-2110 Hz and ac magnetic field amplitudes of 100-1600 A/m. All the susceptibility components exhibit field, frequency and temperature dependences. The ac losses associated with superconducting filaments are considered to be hysteretic in nature with frequency independent behavior, while the losses concerning inter-filament coupling is dependent on the frequency of the ac field. The results are also dependent on the orientation of the specimen, which was placed parallel (PAR) and perpendicular (PER) to the applied ac field. In addition, the temperature dependences of the critical-current density for the sample in PAR and PER are obtained by Kim model and compared to the measured transport critical-current density at 4.2 K for the relevant field configuration. (c) 2006 Elsevier B.V. All rights reserved.