LARGE GYROMAGNETIC EFFECT IN FESIB AMORPHOUS WIRES

Results on a new effect observed in FeSiB amorphous wires - the large gyromagnetic effect - are reported for the first time. This effect con sists in the appearance of a rotation of the sample around its axis wi th frequencies from 1 to 60 Hz when the sample is subjected to an axia l alternating magnetic field of similar to 10(2) A/m having a frequenc y of similar to 10(4) Hz. Both the sample rotation frequency and the f requency of the field at which the effect appears depend on the sample length, the characteristics of this dependence indicating that the ap pearance of the effect is closely related to the formation of a standi ng wave associated to the oscillation of the magnetic moments. The mag nitude of the wire's magnetostriction constant is also essential as co ncerns the appearance of the large gyromagnetic effect.