FeNiCrSiB非晶软磁合金薄带的巨磁阻抗效应

Giant Magnetoimpedance Effect in Amorphous FeNiCrSiB Soft Magnetic Ribbons

研究了 ＦｅＮｉＣｒｓｉＢ 非晶软磁合金薄带的磁性和巨磁阻抗效应。磁阻抗比△Ｚ／Ｚ_ｓ 不仅与样品的磁特性有关，而且与交变电流频率ｆ和外加直流磁场 Ｈ有密切的关系。对退火 温度为３５０℃，退火时间为９０ｍｉｎ的样品，在交变电流频率为２ＭＨｚ下。磁阻抗比△Ｚ／Ｚ_ｓ＝（Ｚ_０－Ｚ_ｓ） ／ Ｚ_ｓ最高可达 ５３．７％。

In this paper we have studied the magnetic properties and giant magnetoimpedance (GMI) effect in amorphous FeNiCrSiB soft magnetic ribbons. The MI ratio △Z/Z_S is not only dependent on the magnetic properties of the sample,but also dependent on the applied magnetic field H and frepuency f of ac current. The MI ratio of samples is defined as △Z/Z_S =(Z_0 -Z_S)/Z_S. After annealed at 350℃ for 90min, the MI ratio of FeNiCrSiB sample can reach a value of 53.7% at 2 MHz.