engleski

Unexpected influence of core currents on magnetisation of nanocrystalline Fe73.5Cu1Nb3Si15.5B7 ribbon

The influence of surface fields H-p, generated by direct (static Hp) and alternating (dynamic H-p) core currents on M-H loops and their parameters (the coercive field H-c maximum (M-m) and remanent (M-r) magnetisation) of amorphous and nanocrystalline Fe73.5CU1Nb3Si15.5B7 ribbon has been investigated. In optimally annealed nanocrystalline sample (H-c = 1.3 A/m, M-m, = M-s in the absence H-p) H-c increases with H-p (both for static and dynamic H-p) whereas M-m decreases with H-p. The unexpected increase of H-c with H-p is associated with the influence of Hp on the surface domain structure and the interaction between the surface and main (inner) domain structure of the sample. These phenomena may affect the performance of the vector magnetometers based on this material.

coercive fields ; core currents ; nanocrystalline sample ; amorphous-alloys ; reduction

Rad je prezentiran na skupu 4th European Magnetic Sensors and Actuators Conference, održanom od 03.–05.06.2002.g., Atena, Grčka.