Correlations between magnetic and resistive transitions in a Bi2Sr2CaCu2O8 ceramic - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Solid State Communications Année : 1996

Correlations between magnetic and resistive transitions in a Bi2Sr2CaCu2O8 ceramic

Jean-Philippe Burin
J. Dehmej
  • Fonction : Auteur
Youssef Fouad
  • Fonction : Auteur
  • PersonId : 937768
A. Raboutou
  • Fonction : Auteur
P. Peyral
  • Fonction : Auteur
C. Lebeau
  • Fonction : Auteur
J. Rosenblatt
  • Fonction : Auteur
C. Carel
  • Fonction : Auteur
A. Ouammou
  • Fonction : Auteur

Résumé

Resistive and inductive transitions are measured on the same Bi2Sr2CaCu2O8 ceramic. The transition curves present accidents which appear to be correlated and amenable to physical interpretation in quantitative agreement with a granular description. We consider two characteristic temperatures: Ts which marks the appearance of superconductivity and Tc < Ts below which long-range coherence occur. In the paracoherent region Tc < T < Ts the excess conductivity is in good agreement with a power law Δσ ∝ |1−T/Tc|−γ with γ = 2.7 while in the coherent region T < Tc the field of first flux penetration is satisfactorily described by a power law H1(T) ∝ (1−T/Tc)n with n = 2.7. The validity of this description is corroborated by the correct prediction, from resistivity data, of the distance d congruent with 0.3±0.1 nm between CuO2 layers in the unit cell.

Dates et versions

hal-00511781 , version 1 (26-08-2010)

Identifiants

Citer

Jean-Philippe Burin, J. Dehmej, Youssef Fouad, A. Raboutou, P. Peyral, et al.. Correlations between magnetic and resistive transitions in a Bi2Sr2CaCu2O8 ceramic. Solid State Communications, 1996, 99 (8), pp.531-536. ⟨10.1016/0038-1098(96)00357-2⟩. ⟨hal-00511781⟩
134 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More