Materials and Nanoscience, Nebraska Center for (NCMN)


Date of this Version



Published in PHYSICAL REVIEW B 66, 144402 (2002). ©2002 The American Physical Society. Used by permission.


We suggest a workable approach for the description of multiscale magnetization reversal phenomena in nanoscale magnets and apply it to CoPt-type alloys. We show that their hysteretic properties are governed by two effects originating at different length scales: a peculiar splitting of domain walls at twin boundaries and their strong pinning at antiphase boundaries. We emphasize that such multiscale nature of hysteretic phenomena is a generic feature of nanoscale magnetic materials.