Study of the domain structure transformation at field-induced first-order transition

Since the magnetic fields of first-order transitions, such as FOMP, spin-flop, are much higher than the demagnetizing field of the sample, most models imply that the sample is always in a single-domain state and the magnetic moments of the atoms rotate coherently in the field. Nonetheless, this assumption may be overly simplistic, and a high-field domain structure could emerge during such field-induced transition, resulting in an alternative transition mechanism, and it is crucial to thoroughly investigate this phenomenon in detail. The main goal of this proposal is to observe and explore an intermediate element-specific domain structure at the FOMP transition in Tb2Fe17 and Er2Fe17 single crystals. We also aim to study the nucleation and growth of ferromagnetic domains during spin-flop transition in Nd6Fe13Cu single crystals. The obtained results will serve as a base for new model of field induced transition, developing by our group.