R. Kumar et al., EFFECT OF THERMOMAGNETIC HISTORY OF FIELD-COOLED MAGNETIZATION ON THEIRREVERSIBILITY LINE IN CONVENTIONAL AND HIGH-TC SUPERCONDUCTORS, Physica. B, Condensed matter, 194, 1994, pp. 1857-1858
We report the thermomagnetic history of field-cooled magnetization in
conventional hard type-II superconductor (Nb) and in high-T(c) superco
nductor (single crystal of Bi2Sr2CaCu2O8+y). Among various procedures
to locate the irreversibility line, the one generally used is the merg
er of zero-field-cooled magnetization (M(ZFC) and field-cooled magneti
zation (M(FC)). The thermomagnetic history of M(FC) provides the merge
r of M(ZFC) and M(FC) at two points (one while cooling down, T(r)c(H),
and other while warming up, T(r)w(H)) at the same field.