In this paper, a method to enhance the sensitivity of a GMI sensor based on a single longitudinal amorphous ribbon
is analyzed, and a method to reduce the noise component is investigated.
Of course, we are greatly interested in the following question: 'why does the stable boride form in annealing the amorphous ribbon
at a relatively low temperature and a long annealing time and the already solidified specimen additional annealing carried out at even higher temperature in the same annealing time does not contain this boride?'.
The idea of a biosensor based on amorphous ribbon
is attractive since this would allow construction of a cheap detector with the sensitive element designed as a disposable strip.
The as-prepared amorphous ribbon
is about 20 um in thickness and 1 mm in width.
Master alloy of the nominal composition of [Fe.sub.40.5][Co.sub.40.5][Nb.sub.7][B.sub.12] have been prepared by arc-melting from elements of 99.95% purity and amorphous ribbon
6 mm wide and about 20 [micro]m thick was produced by planar flow casting technique in vacuum at the Institute of Physics, Slovak Academy of Sciences in Bratislava.
The iron rich metallic glasses have sizeable magnetostriction constants, and the coupling of magnetic and mechanical parameters can be enhanced by annealing the amorphous ribbon
appropriately in an external magnetic field.
It is seen that the [T.sub.x1] of the as-quenched ribbon increases from 707.45 K to 778.35 K with the increase of B content from 12 at.% to 18 at.%, which indicates that the increase of B content is beneficial to the thermal stability improvement for the given amorphous ribbons
. However, the [T.sub.x2] of the as-quenched ribbon gradually decreases as the B content is greater than 14at.%.
The aim of the paper is complex observation and analysis of magnetic domains in bilayered FeSiB/FeNbSiB and FeNbCuSiB/CoSiB amorphous ribbons
. We benefit from high resolution of MFM setup compared with MOKM flexibility and direct interpretation of domain images.
Fiorillo, "High-frequency properties of thin amorphous ribbons
," Journal of Magnetism and Magnetic Materials, vol.
Nanocrystalline soft magnetic alloys prepared by devitrification of melt-spun amorphous ribbons
are interesting because of their magnetic properties superior to previously used materials, offering large inductions and good temperature stability.
Other possible morphologies include fibrous structures, platelets, amorphous ribbons
, and even dual-phase interpenetrating blends, created by drawing one layer of material through holes in another layer and tacking the two together.