High temperature c-axis resistivity of Bi2Sr2CaCu2O8+x single crystals and dependence on oxygen stoichiometry

27 September 1999

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 75 (13) , 1955-1957
https://doi.org/10.1063/1.124883

Abstract

The c-axis resistivity of Bi2Sr2CaCu2O8+x crystals has been measured as a function of thermal cycling in the range between 70 and 856 K in flowing oxygen and nitrogen. Hysteresis in the temperature-dependent c-axis resistivity provides evidence of thermally activated oxygen diffusion in and out of the crystal varying as D(T)=6×107 exp(−Δ1/kT) and D(T)=55 exp(−Δ2/kT), where Δ1=2.2 eV and Δ2=1.2 eV, respectively. Oxygen diffusion into the crystals becomes significant above T0∼595 K and out of the crystal above T1∼750 K. The implications for the stoichiometric control, superconductivity, and intrinsic high temperature dependence of the resistivity of Bi2Sr2CaCu2O8+x crystals are considered.

Keywords

This publication has 8 references indexed in Scilit:

The pseudogap in high-temperature superconductors: an experimental survey
Reports on Progress in Physics, 1999
Anisotropic oxygen diffusion in Bi2Sr2CaCu2O8+x single crystals
Physica C: Superconductivity and its Applications, 1994
Monoclinic phase transition and twinning in ${Bi}_{2}$ ${Sr}_{2}$ ${CaCu}_{2}$ $O_{y}$ single crystals
Physical Review B, 1993
High-temperature resistivity and oxygen diffusion in Bi2Sr2CaCu2Ox
Physica C: Superconductivity and its Applications, 1993
Growth of BSCCO and YBCO single crystals using large temperature gradients
IEEE Transactions on Applied Superconductivity, 1993
Intrinsic Josephson effects in ${Bi}_{2}$ ${Sr}_{2}$ ${CaCu}_{2}$ $O_{8}$ single crystals
Physical Review Letters, 1992
Angle-resolved-photoemission study of ${Bi}_{2}$ ${Sr}_{2}$ ${CaCu}_{2}$ $O_{8 + δ}$ : Metallicity of the Bi-O plane
Physical Review Letters, 1990
Structural phase transitions of superconducting materials Bi1−xPbxSrCaCu2Oy (x=0, 0.2)
Solid State Communications, 1988