PEIERLS 'WASHBOARD' CONTROLS DYNAMICS OF THE DOMAIN WALLS IN MOLECULAR FERRIMAGNETS

摘要

The magnetization dynamics of metal-organic crystals has been studied in low frequency AC magnetic field. Four modes of domain wall motion (Debye relaxation, creep, slide and over - barrier motion (switching)) were distinguished in [Mn~(II)(H(R/S)-pn)(H_2O)] [Mn~(III)(CN)_6]?2H_2O crystals. Debye relaxation and creep of the domain walls are sensitive to Peierls relief configuration controlled by crystal lattice chirality. Structural defects and periodical Peierls potential compete in the damping of the domain walls. Driving factor of this competition is ratio of the domain wall width to the crystal lattice parameter.