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The giant magnetoimpedance (GMI) effect in as-quenched Fe_(89) _xZr_7B_4Cu_x (x= 1.0-2.5) ribbons is reported. The as-quenched Fe_(89-x)Zr_7B_4Cu_x(x=1.0-2.5) ribbons were prepared by the vacuum melt-spun processes with the quenching speed of 37m/s. The magnetoimpedance measurement were performed at room temperature, where the current flows through the length of the ribbons in the direction parallel to the dc fields. Results show that values Z (impedance), R (resistance) and X (reactance) for both H=0 A/m and H=5 127 A/m increases with increasing ac frequency. This can be explained by the skin effect mechanism. The GMI effect almost can not be found in the Cu content (mass fraction) range x ≤ 1.5%. With increasing Cu content x > 1.5%, the GMI effect become evident for as-quenched Fe_(89-x)Zr_7B_4Cu_x (x=1.0-2.5) ribbons. GMI ratio (Z(0)-Z(H)/Z(0)) in as quenched Fe_(86.5)Zr_7B_4Cu_(2.5) with melt-spun quenching speed of 37 m/s can reaches 33.69% atH=5 127 A/m. This indicated that good GMI properties can
The as-quenched Fe_ (89-x) Zr_7B_4Cu_x (x = 1.0-2.5) ribbons were prepared by the The magnetoimpedance (GMI) effect in as-quenched Fe_ (89) _xZr_7B_4Cu_x vacuum melt-spun processes with the quenching speed of 37 m / s. The magnetoimpedance measurements were performed at room temperature, where the current flows through the length of the ribbons in the direction parallel to the dc fields. , R (resistance) and X (reactance) for both H = 0 A / m and H = 5 127 A / m increases with increasing ac frequency. This can be explained by the skin effect mechanism. The GMI effect almost can not be found In the Cu content (mass fraction) range x ≤ 1.5%. With increasing Cu content x> 1.5%, the GMI effect becomes evident as-quenched Fe_ (89- x) Zr_7B_4Cu_x (x = 1.0-2.5) ribbons. (Z (0) -Z (H) / Z (0)) in as quenched Fe_ (86.5) Zr_7B_4Cu_ (2.5) with melt-spun quenching speed of 37 m / s can reaches 33.69% atH = 5 127 A / m. This indicates that goo d GMI properties can