J. Phys. IV France 08 (1998) Pr2-233-Pr2-236
Magnetic properties of thin films of FeCuRSiB type alloys (R-rare earth)I. Goscianska1, H. Ratajczak2, M. Urbaniak2, P. Sovák3, A. Zorkovská3, P. Matta3 and M. Konc3
1 Institute of Physics, A Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland
2 Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznan, Poland
3 Department of Experimental Physics, P.J. Safárik University, Park Angelinum 9, 040-154 Kosice, Slovakia
As a continuation of our investigation of FINEMET alloy thin films. Fe23.5Cu1Nb3Si13.5B9, with Nb replaced by other high-melting metals W, Mo, Ta, V [1.5], in this work we report studies on the alloys in which these refractory elements were replaced by the following representatives of lanthanides : Yb, Ho, Tb, Gd, Sm, Nd, Pr an Y as en element without a magnetic moment . Their structure was determined on the basis of electron diffraction studies and TEM observations. The structure of as-deposited films was found to be strongly dependent on the deposition conditions. The films deposited for less than 30 seconds were amorphous whereas those deposited for a longer time revealed microcrystalline structure (the temperature of the evaporation source was the same for all samples). The coercive field Hc in the film plane and the Hall extraordinary coefficient R1 together with the value of magnetic saturation induction B, for the films of both types were determined from the magnetooptical Faraday effect and the Hall effect, respectively. A strong correlation between the magnetic behaviour and structural changes of the films was found, i.e., a strong increase in Hc and decrease in R1 with increasing annealing temperature were observed.
© EDP Sciences 1998