Abstract
The investigation is focused on the effect of Cr incorporation for Co/Fe in (Co0.5Fe0.5)78−xCrxSi8B14 (x=0–12) amorphous microwires of 110μm diameter prepared by in-water quenching technique. The rise in crystallization onset TX1 with Cr addition revealed the elemental contribution against devitrification and a consequent thermal stability. Cr is unfavorable towards ferromagnetic ordering leading to a linear drop in Curie temperature Tca with its rise in concentration. The presence of low Cr content upto Cr-4at.% has been effective in drastically improving the Giant magneto-impedance (GMI) property. Cr content in the range of 4≤X≤10 has low magnetostriction and maximum field sensitivity in the as-quenched state. The GMI properties are further improved after annealing treatment. High content of Cr>10 is found to be deleterious towards GMI behavior and its consequent application as sensor material.
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