Performances of a high sensitive trilayer F/Cu/F GMI sensor

F. Alves,J. Moutoussamy,C. Coillot,L. Abi Rached,B. Kaviraj

Sensors and Actuators A: Physical（2008）

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摘要

We have selected stress-annealed nanocrystalline FeSiBCuNb ribbons for trilayer ferromagnetic/copper/ferromagnetic sensors exhibiting high magneto-impedance (MI) ratio. Longitudinal MI δZ reaches 450% at 60kHz. Measurements of responses of the GMI sensor on the small amplitude ac fields displays sensitivity of 60V/T up to a few 100Hz. The noise equivalent magnetic induction is equal to 13nT/Hz+1/2, limited to the added noise from electronics.

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关键词

Magneto-impedance,Stress-annealing,Nanocrystalline materials,Magnetic sensors

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