Oxygen stoichiometry, critical temperature and pinning mechanisms in the 2212 BSCCO superconductor

J.M. GONZALEZ CALBET; A. BADIA; M. VALLET-REGI; A. CANEIRO; J. RAMIREZ; C. RILLO; F. LERA; R. NAVARRO

PHYSICA C - SUPERCONDUTIVITY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 1992 vol. 203 p. 223 - 230

0921-4534

Accurate chemical and structural characterizations, critical temperatures (T c) derived from magnetic measurements and magnetization analysis of the pinning force density (F p) on a series of BSCCO samples have been used to model the effect of the oxygen content (y). The variations of c-axis, T c(y) and F p(y) are related to those of the irreversibility fields (B irr) through the change in the number of oxygen vacancies, which are considered as effective pinning sites. The scaling of F p(B) using B irr is analyzed.