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Effect of heat treatment under an external magnetic field on the soft magnetic properties in FeCo-based nanocrystalline alloys

I. Škorvánek1 - J. Marcin1 - J. Turċanová1 - J. Kováċ1 - P. Švec2

1 Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova~47,~040~01~Košice,~Slovakia
2 Institute of Physics, Slovak Academy of Sciences, Dúbravská~cesta~9,~842~28~Bratislava,~Slovakia

We report on the effects of both longitudinal and transverse magnetic fields applied during the heat treatment on the magnetic behaviour in the Fe44.5Co44.5Zr7B4 and Fe38Co38Mo8B15Cu1 nanocrystalline alloys. Sheared loops with good field linearity were achieved after annealing in a transverse magnetic field. The stronger response to the transverse field-annealing is observed for the alloys containing Zr, where the values of the induced anisotropy constant up to Ku ∼ 1250 J/m3 can be reached. A heat treatment under the longitudinal magnetic field results for the Mo-containing samples in squared hysteresis loops characterized by coercive field values in the range of 3-8 A/m. These values are superior to those previously reported for the FeCo-based nanocrystalline materials. Figs 4, Refs 8.

Magnetohydrodynamics 45, No. 3, 347-352, 2009 [PDF, 0.53 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X