Co-Fe-Ni-Nb-Si-B非晶软磁合金薄带巨磁阻抗效应

GIANT MAGNETOIMPEDANCE EFFECT OF AMOR-PHOUS Co-Fe-Ni-Nb-Si-B SOFT MAGNETIC RIBBONS

研究了Ｃｏ－Ｆｅ－Ｎｉ－Ｎｂ－Ｓｉ－Ｂ非晶软磁合金薄带的磁性和巨磁阻抗（ＧＭＩ）效应．样品在３５０℃下退火６０ｍｉｎ后获得了最佳的软磁特性，并表现出优良的 ＧＭＩ效应．在１．４ ＭＨｚ的交变电流频率下，获得了最大的 ＧＭＩ效应，磁阻抗比△Ｚ／Ｚｓ＝（Ｚ０－Ｚｓ）／Ｚｓ最高可达１９２％．在低频下得到了显著的巨磁电感效应，在１００ｋＨｚ下，磁电感比达到７６９％．在高频下，材料表现出优良的巨磁电阻效应，在１３ ＭＨｚ下，磁电阻比达到 ３８３％．

The magnetic properties and giant magnetoimpedance (GMI) effects of amorphous Co-Fe-Ni-Nb-Si-B soft magnetic ribbons were studied. The samples annealed at 350℃ for 60 min have the best soft magnetic properties, and show the superior GMI effects. The maximum GMI effect has been obtained at a frequency of 1.4 MHz. The maximum magnetoimpedance ratio, △Z/Zs= (Zo - Zs)/Zs, is 192%. An excellent magnetoinductive effect has been obtained at low frequencies. The magnetoinductive ratio as large as 769% is obtained at 100 kHz. At high frequencies, the ribbon show very good magnetoresistance effect. The magnetoresistance ratio at 13 MHz is 383%.