J. Phys. IV France 08 (1998) Pr2-111-Pr2-114
Influence of Ni-substitution on magnetic properties of annealed FeNiNbCuSiB alloysP. Vojtaník1, E. Komová1, R. Varga1, R. Matejko1, R. Grössinger2, H. Sassik2, P. Agudo3, M. Vásquez3 and A. Hernando3
1 Department of Experimental Physics, Fac. Sci., P. J. Safárik's University, Park Angelinum 9, 04754 Kosice, Slovakia
2 Institut für Experimentalphysik, Technische Universität Wien, Wiedner Haupststr. 8-10, 1040 Wien, Austria
3 Instituto de Magnetismo Aplicado, RENFE-UCM, Instituto de Ciencia de Materiales, CSIC, P.O. BOX 155, 28230 Las Rosas, Madrid, Spain
A set of amorphous Finemet based ribbons of the composition Fe73 5-xNixNb3Cu1Si13-5B9 (0 ≤ x ≤ 25) was produced bu melt spinning technique. For determining the critical temperatures DSC studies as wel as ac-susceptibility measurements were performed. Additionally pinning field and MAE (magnetic after-effect studies were made. After a heat treatment at 550°C for 1h a nanocrystalline state was formed which leads to a magnetic softening for Ni concentrations up to x=15. The first crystallization temperature at about 545 °C is nearly independent of the Ni concentration. The second crystallization stage decreases from 695°C (for x=0) to 588°C (for x=25°C).
© EDP Sciences 1998