Tuning the Magnetoimpedance, Magnetoresistance, and Magnetoinductance of Melt-Spun Ribbons

Magnetoresistance (MR), magnetoinductance (mi), and magnetoimpedance (MI) studies on the as-quenched and annealed Fe₇₂Si₁₀Cu₁Nb₂B₁₅, Co₇₂Ni₅Si₅Cu₁Nb₂B₁₅, and Co₇₇Si₅Cu₁Nb₂B₁₅ ribbons have been carried out in the present investigation. Structural studies indicate that all as-quenched samples are in the amorphous phase. The asymmetry in the MI, MR, and mi curves is noticed and is attributed to induced magnetocrystalline anisotropy and hysteretic magnetization. Among all three samples, the Co₇₇Si₅Cu₁Nb₂B₁₅ ribbons exhibit the highest magnetization and MI values. The development of a strong transverse magnetic anisotropy upon annealing has been observed in the Co₇₇Si₅Cu₁Nb₂B₁₅ ribbons, while such features are not observed in other cases. The present study shows that 5% Ni substitution in Co₇₇Si₅Cu₁Nb₂B₁₅ samples significantly reduces the transverse anisotropy, indicating that the transverse anisotropy can be tuned through Ni substitution.