Physics – Condensed Matter – Materials Science
Scientific paper
2006-04-15
Int. J. Mod. Phys. B, Vol 21 (2007) pp 3859-3867
Physics
Condensed Matter
Materials Science
12 pages, 7 figures, to be published in "International Journal of Modern Physics B"
Scientific paper
10.1142/S0217979207037715
The magneto-impedance (MI) in amorphous ribbon of nominal composition Fe73.5Nb3Cu1Si13.5B9 has been measured at 1MHz and at room temperature for different configurations of exciting a.c and biasing d.c. fields. A large drop in both resistance and reactance is observed as a function of d.c magnetic field. When the d.c and a.c fields are parallel but normal to the axis of ribbon, smaller magnetic field is needed to reduce the impedance to its small saturated value compared to the situation when fields are along the axis of ribbon. Larger d.c. field is required to lower the impedance when the d.c field acts perpendicular to the plane of the ribbon. Such anisotropy in magneto-impedance is related to the anisotropic response of the magnetization of ribbon. The large change of impedance is attributed to large variation of a.c permeability on the direction and magnitude of the dc biasing field.
Ghatak Sobhendu K.
Kaviraj B.
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