I. Felner, THE EFFECT OF GRAINS SIZE AND TEMPERATURE ON SUPERCONDUCTING PARAMETERS, JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 52(2), 1998, pp. 447-452
A survey of published data on the effect of the grains size and temper
ature on magnetic parameters of YBa2Cu3O7 is given. The magnetization
values are divided into two major parts.. 1. Intrinsic parameters such
as: Hc(1), Hc(2), lambda etc which are not affected by the grains siz
e and 2. values such as: the shielded and Meissner fractions, the intr
agrain critical current density (J(c)) and the demagnetization factor
which reflect specific features of the real size of the granular ceram
ic superconductor. The close relation between the grains size and the
second group of parameters is discussed.