Magnetoimpedance of amorphous (FeV) _{80}B _{20} ribbons in a longitudinal field
Abstract
Amorphous Fe _{80  x}V _{x}B _{20} ribbons (with x = 0  16 at% V) were cast by rapid quenching. In this report we studied the response of the impedance Z of these ascast glasses to an external magnetic field. The frequency f of the driving current was varied from 10 kHz to 5 MHz. When f is fixed, a longitudinal field along the long side of the sample was applied to examine the resistive R(H) and reactive X(H) plots. The magnetoimpedance (MI) is defined as ∆R/R = [R(0)/R(H _{s})]  1 and ∆X/X = [X(0)/X(H _{s})]  1 , where H _{s} is the minimum field to saturate the sample. The spectra of ∆R/R and ∆X/X showed that ∆R/R increases, while ∆X/X decreases with f. At room temperature the largest MI is about 20% (sensitivity 3%/Oe) from Fe _{75.2}V _{4.8}B _{20} sample.
 Publication:

Journal of Magnetism and Magnetic Materials
 Pub Date:
 January 1998
 DOI:
 10.1016/S03048853(97)008299
 Bibcode:
 1998JMMM..177..109J