Multiscale nature of hysteretic phenomena: Application to CoPt-type magnets

Authors

Kirill D. Belashchenko, University of Nebraska-LincolnFollow
Vladimir P. Antropov, Ames Laboratory, US Department of EnergyFollow

Date of this Version

10-2-2002

Comments

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

Abstract

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.