Different roles of anisotropy and disorder on the vortex matter of Bi2Sr2CaCu2O8+δ single crystal

D. Darminto, M. Diantoro, I. M. Sutjahja, A. A. Nugroho, W. Loeksmanto, M. O. Tjia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The oxygen doped and Pb-substituted single crystalline Bi2Sr2CaCu2O8+δ samples having Tc,on and anisotropy (γ2) ranging respectively from 65 to 93 K and from 773 to 49,715 have been studied in the basis of magneto-resistance and magnetization data. It is found that the lowering of anisotropy due to higher oxygen content or Pb substitution is responsible for the reduction of magnetic field-induced transitional broadening and a shift of Hirr(T) and Hg(T) to higher temperatures and magnetic field. Meanwhile, the increasing disorder manifested by decreasing Tc also leads to the extended range of appearance for the second magnetization peak (SMP) and enlarged critical glassy region. It is shown that decreasing anisotropy does not necessarily lead to the lowering of Tc in contrast to the monotonic dependence of Tc on the disorder measured in the temperature range of SMP effect. Additionally, a remarkable monotonic correlation between Tc and the glassy exponent s has been established.

Original languageEnglish
Pages (from-to)479-482
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 1
Publication statusPublished - 1 Oct 2002


  • Anisotropy and disorder
  • Bi-2212
  • Oxygen doping and Pb substitution
  • Vortex state


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