magneto-impedance;
stress-annealing;
nanocrystalline materials;
magnetic sensors;
D O I:
10.1016/j.sna.2007.12.016
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
We have selected stress-annealed nanocrystalline FeSiBCuNb ribbons for trilayer ferromagnetic/copper/ferromagnetic sensors exhibiting high magneto-impedance (MI) ratio. Longitudinal MI delta Z reaches 450% at 60 kHz. Measurements of responses of the GMI sensor on the small amplitude ac fields displays sensitivity of 60 V/T up to a few 100 Hz. The noise equivalent magnetic induction is equal to 13 nT/Hz(+1/2) limited to the added noise from electronics. (C) 2008 Elsevier B.V. All rights reserved.