Superconductivity - Flux lattice makes a hesitant breakaway. Communications from the Kamerlingh Onnes Laboratory 1995 Superconductivity - Flux lattice makes a hesitant breakaway. They exhibit a wide variety of particles differing in form, size and phase composition.
Carbides dominate among the ferromagnetic phases.
The fractions exhibiting superparamagnetic behaviour contain fine Fe and Fe-C particles in graphite. Changes in the phase composition due to tempering at elevated temperatures lead to the Fe-C equilibrium.