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The magneto-impedance (MI) in amorphous ribbon of nominal compositionFe73.5Nb3Cu1Si13.5B9 has been measured at 1MHz and at room temperature fordifferent configurations of exciting a.c and biasing d.c. fields. A large dropin both resistance and reactance is observed as a function of d.c magneticfield. When the d.c and a.c fields are parallel but normal to the axis ofribbon, smaller magnetic field is needed to reduce the impedance to its smallsaturated value compared to the situation when fields are along the axis ofribbon. Larger d.c. field is required to lower the impedance when the d.c fieldacts perpendicular to the plane of the ribbon. Such anisotropy inmagneto-impedance is related to the anisotropic response of the magnetizationof ribbon. The large change of impedance is attributed to large variation ofa.c permeability on the direction and magnitude of the dc biasing field.Comment: 12 pages, 7 figures, to be published in "International Journal of  Modern Physics B

ANISOTROPIC DEPENDENCE OF GIANT MAGNETO-IMPEDANCE OF AN AMORPHOUS FERROMAGNETIC RIBBON ON BIASING FIELD