Influence of DC Joule-heating treatment on magnetoimpedance effect in amorphous Co64Fe21B15 alloy

The influence of an isothermal annealing process on the structure and magnetic properties of the bulk amorphous alloy FeCoBYMo

“…[9][10][11][12] As shown in the literature, the magnetic properties of amorphous alloys depend strongly on the annealing temperature. [13][14][15][16] During the earlier sample production process, free volumes are created; annealing the samples at low temperatures leads to the diffusion of these free volumes to the surface of the material. Thus, the soft magnetic properties of these alloys can be improved Materiali in tehnologije / Materials and technology 51 (2017) 1, 157-162 through the relaxation of internal stress, by annealing them at less than the crystallization temperature.…”

Magnetoimpedance and Field Sensitivity of CoFeSiB Amorphous Ribbons under Applied Tensile Stress

“…Gonzalez et al [13] found that the MIR in glass-covered Co-rich wires was little increased when axial tensile stress less than 100 MPa was applied, but its improvement was not significant, and a maximum value as high as 130 % at 10 MHz was observed when the tension was about 60 MPa [14]. It is known that application of an external tensile stress increases the inner core domains under stress-induced magnetoelastic field, develops an axial anisotropy, and hence reduces the MI effect [15]. Zhang et al [16] studied the MIR of amorphous cobalt-based wires in the frequency range of 0.1 to 20 MHz before and after applying an axial tensile stress.…”

Correlation of magnetic domains, microstructure and GMI effect of Joule-annealed melt-extracted Co68.15 Fe4.35 Si12.25 B13.75 Nb1 Cu0.5 microwires for double functional sensors

“…Based on this principle, the element B in CoFeSiB alloy is substituted for Nb and Cu with low resistivity materials and a small amount of 1 and 0.5 at%, respectively. Meanwhile, the enhancement of circular MDS and changes of micro-sized structure relaxation by appropriate Joule annealing can lead to a simultaneous improvement in the GMI effect and its field sensitivity for obtaining the high circular magnetic permeability and releasing inner residual stress adequately [24][25][26]. Also, it possesses a circumferential anisotropy with the effective anisotropy field for a certain annealing.…”