Magnetic properties of amorphous and nanocrystalline FeNiZrCuB alloys

The coercive fields H-c, saturation magnetizations J(s) and magnetostrictio ns lambda(s) of the amorphous Fe86-xNixZr7Cu1B6 alloys with different conte nts of Ni (0-86 at.%) were investigated at room temperature. Thermomagnetic analyses by means of initial AC permeability and resistivity at the amorph ous and nanocrystalline states of the investigated alloys were performed up to 550 degrees C. It was found that additions of Ni up to a = 33 at.% caus e an increase of H-c, J(s), lambda(s). Additons of Ni (x = 0 - 43) cause dr astic increase of the Curie temperature from 71 degrees C for x = 0at.% to 373 degrees C for x = 43at.% of Ni. Higher concentration of Ni causes a dec rease of H-c, J(s), lambda(s) and T-c.