Fabrication of High Temperature Tc Measurement Set-Up and To Study Of Giant Magneto Impedance of Some Iron Rich Soft Ferromagnetic Materials.

Volume 20 No 13 (2022)

Debashis Das

DOI: 10.14704/NQ.2022.20.13.NQ88071

Abstract

The magnetic transition temperature TC (Curie temperature) of the FINEMET (Fe73.5Nb3Cu1Si13.5B9) sample is being measured. It was found to be 568.53 kelvin. We repeated the same process to measure TC of some other soft ferromagnetic glasses Fe82B12Mo7Cu1 (Sample-3) & Fe83B12Mo5 (Sample-4).The Currie temperature of the sample S3 & S4 are 365.1 kelvin &385 kelvin. We have also study of Giant Magneto impedance of some iron rich soft ferromagnetic materials of Fe73.5Nb3Cu1Si13.5B9 (sample-0), Fe81B12Mo7 (sample-1), Fe80B12Mo7Cu1 (sample2), Fe82B12Mo7Cu1 (sample-3) and Fe83B12Mo5 (Sample-4) These samples are magnetically soft materials. We have studied GMI effect in those Fe-based soft ferromagnetic alloys. The maximum MI effect of 90% for FINEMET sample was observed in as-cast form at room temperature at a magnetic field of only 100 Gauss and at a frequency of 1MHz. The magnetic field was applied along the direction of the ribbon axis. The MI% was found to reduce slightly for higher frequency.

Keywords

Susceptibility, Curie temperature, permeability, inductance, Soft ferromagnetic materials, Magneto impedance

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