C. Baraduc et al., MAGNETIZATION STUDY OF AN OPTIMIZED SINGLE-CRYSTAL OF YBA(2)CU(3)O7(-DELTA), Physica. C, Superconductivity, 235, 1994, pp. 1555-1556
A 2D-3D cross-over is observed on the magnetisation data using an appr
opriated scaling of the fluctuations under field. The temperature of t
he cross-over shifts with increasing field which is quantitatively con
sistent with the decrease of the critical temperature. A crossing poin
t of the M(T)-curves is also observed.