COUPLING EFFECTS IN FE CONBZR AND FE/AG/CONBZR SANDWICHES STUDIED BY MAGNETOOPTICAL TECHNIQUES/

Experimental characterization of;magnetic anisotropy, coercive field, and anisotropy dispersion of sputtered Fe/CoNbZr and Fe/Ag/CoNbZr sand wiches were carried out by transverse biased initial susceptibility (T BIS) measurements with a magneto-optic Kerr effect at both film/air an d glass/film interfaces. Three different behaviors have been observed depending on the range of magnetization fluctuation. The results indic ate that Fe grains play a fundamental role in the type of the dispersi on (long range or short range). The results obtained from the coercive field and from x-ray diffractograms agree with those obtained by TBIS . (C) 1996 American Institute of Physics.