Giant magnet impedance effect composite wire with barrier layer and its preparing method

The present invention relates to composite wire with barrier layer possessing giant magnetic impedance effect, and belongs to the fields of magnetic sensing, storing and information functional material and the preparation technology. The composite wire consists of metal wire, barrier layer and soft magnetic layer. The barrier layer of insulating material is attached to the surface of the metal wire, and the soft magnetic layer of GMI soft magnetic material is attached to the surface of the barrier layer. The preparation process includes painting barrier layer onto the metal wire, chemically plating the soft magnetic layer onto the barrier layer, and annealing. The composite wire with giant magnetic impedance effect has simple preparation process, relatively high giant magnetic impedance effect and low work frequency and may be used in device conveniently and reliably. 一种带阻挡层巨磁阻抗效应复合丝及其制备方法，属于磁传感存储和信息功能材料及其制备技术领域。该复合丝由金属丝(1)、阻挡层(2)和软磁层(3)组成，阻挡层(2)是绝缘层，软磁层(3)是GMI软磁材料层，阻挡层(2)依附在金属丝(1)表面，软磁层(3)依附在阻挡层(2)表面。制备时，在金属丝(1)表面涂敷阻挡层(2)，再在阻挡层(2)上用化学法镀一层软磁层(3)，退火后得成品，带阻挡层巨磁阻抗效应复合丝。该复合丝制备工艺简单，具有较高的巨磁阻抗效应值，工作频率低，应用在器件上方便可靠。