  The magnetometric technique of First Order Reversal Curve (FORC) analysis,
applicable to hysteretic systems, is introduced to the study of superconducting
samples. Some typical superconducting structures in FORC diagram are
identified, and the reversible and irreversible components are isolated,
allowing the identification of typical magnetic features for superconductors
and therefore extending the usefulness of the technique to more complex systems
like hybrid S/N, S/F, and spin valves by improving the characterization of
interactions among the components.
