磁场退火对CoFeNiNbSiB薄带巨磁阻抗的影响

INFLUENCES OF MAGNETIC FIELD ANNEALING ON GIANT MAGNETOIMPEDANCE EFFECTS OF CoFeNiNbSiB RIBBONS

本文研究了磁场退火对CoFeNiNbSiB非晶薄带巨磁阻抗（GMI）效应的影响.样品在不同条件下进行了退火热处理.结果表明,在300℃下经横向磁场退火处理后获得了最佳的软磁特性,从而得到了最大的GMI效应.在800kHz的交变电流频率下,得到了236％的最大磁阻抗比.在低场下,材料的磁阻抗磁场灵敏度达到1152％/mT.

The influences of magnetic field annealing on GMT effects of CoFeNiNbSiB amorphous soft magnetic ribbons were studied. The samples were annealed under different conditions. After the samples were annealed at 300 degreesC in a transverse magnetic field, the best soft magnetic properties and the maximum GMT effect have obtained. The maximum magnetoimpedance ratio is 236% at a frequency of 800 kHz. The magnetic field sensitivity of the GMT is as large as 1152%/mT at low field.