Multiplication of domain walls by eddy currents in nanocrystalline soft magnetic materials

Abstract Multiplication of domain walls by eddy currents under high magnetising frequency in field-annealed nanocrystalline soft materials was investigated. Direct evidence for multiplication was observed at a critical field H ct . It allowed the determination of the wall energy and the effective anisotropy 〈 K 〉=14.3 J/m 3 . This result can be well explained by an adaptation of the Herzer formula by considering a contribution of the field-induced anisotropy to the magnetisation process.