Investigation of odd-order harmonic susceptibilities of a bulk Tl2Ba2Ca2Cu3O10 superconductors using critical state approach

Aksu E., Gencer A., Calinli N., Koralay H., Cavdar S.

PHYSICA B-CONDENSED MATTER, cilt.363, sa.1-4, ss.158-165, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 363 Sayı: 1-4
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.physb.2005.02.035
  • Dergi Adı: PHYSICA B-CONDENSED MATTER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.158-165
  • Anahtar Kelimeler: AC susceptibility, bean model, flux dynamics, Tl-based superconductors, X-ray powder diffraction, HIGH-TEMPERATURE SUPERCONDUCTORS, AC MAGNETIC-SUSCEPTIBILITY, CRITICAL CURRENT-DENSITY, T-C SUPERCONDUCTORS, FLUX-CREEP REGIME, FREQUENCY-DEPENDENCE, LOSS PEAK, DISKS, FIELD
  • Ankara Üniversitesi Adresli: Evet

Özet

The fundamental and high-order harmonic susceptibility, chi(n) = chi(n)' + i chi(n)'' (n = 1, 3, 5 and 7) were measured as a function of temperature (50-130 K), frequencies (11 and 140 Hz) and AC magnetic field amplitude (80-1280 A/m) on a bulk Tl2Ba2Ca2Cu3O10 high-T-c superconductor prepared by the solid-state reaction method. They exhibit dependence on the amplitude of the AC field. The observed dependences were analyzed by using the Bean Model. We have obtained an empirical function for the penetration field H-p = H-alpha(1-t)(beta), with t = T/T-cb. Best fitting to data was obtained with parameters H-alpha approximate to 2.6 x 10(4) A/m and beta = 1.74. The experimental values agree well with the theoretical findings. The XRD pattern, resistivity measurement and SEM analysis were also carried out to characterize the sample. (c) 2005 Elsevier B.V. All rights reserved.