Amorphous Fe72Cu1V4Si15B8 ribbon as magneto-impedance sensing element

Abstract

?agneto-impedance (MI) effect in the Fe72Cu1V4Si15B8 amorphous ribbon obtained by melt spinning method has been studied. The aim of study was the characterisation of this ribbon in as-cast state in terms of its application as a MI sensor. The experiments on MI elements were performed in the frequency range from 30 kHz to 300 MHz and maximum external magnetic field up to 28.6 kA/m. Maximum observed MI-ratio (?Z = Z(0) - Z(Hmax), Hmax = 28.6 kA/m) has amounted to ?Z/Z(Hmax) = 173% at a frequency of 20.46 MHz. The MI curve measured up to 20 MHz shows some shoulder indicating the growth of rotational contribution of magnetization that appears above the domain wall relaxation frequency. The MI profile at frequencies higher than 30 MHz, exhibits a clear peak positioned at transverse anisotropy field Hk, suggesting domination of rotation magnetization in transverse permeability. The linearity in the range up to 5 kA/m with sensitivity of about 11 %/kA/m was observed. [Projekat Ministarstva nauke Republike Srbije, br. OI 172057]

Characterization of FeCoV alloy processed by PIM/MIM route

“…Nowadays it is necessary to simulate electronic circuits by computer software with option to model magnetic components prepared by variety of soft, semi-hard as well as hard magnetic materials. Programs should also have the capability to simulate frequency dependent hysteresis loops of magnetic materials due to very high operating frequencies in some applications [22]. The most widespread simulation computer software for electronic circuit analysis -PSPICE program uses the Jiles-Atherton model for ferromagnetic hysteresis [23].…”

The inverted hysteresis loops and exchange bias effects in amorphous/nanocrystalline Fe72Cu1V4Si15B8 ribbons at room temperature

“…The evolution of amorphous/nanocrystalline structure accompanied with the appearance of EB effect as well as the influence of sample length on IHL effect, was studied. The investigated FeCuVSiB alloy ribbons possess curious properties as a magnetoimpedance MI -sensing element [38].…”

“…The shift of hysteresis loop due to the exchange of energy between different components, with marked characteristic points H c , H c1 , H c2 and H eb[38].…”