期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 551, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2022.169131
关键词
Soft magnetic material; Co-based amorphous ribbon; Magnetic field annealing; Stress-induced GMI effect
资金
- National Key Research and Devel-opment Program of China [2019YFE0122900]
- Na-tional Natural Science Foundation of China [51971162, U1933112, 51671146]
This study investigates the effect of magnetic field annealing on the soft magnetic properties, thermal stability, and stress-induced GMI effect of Co-based amorphous alloys. The results show that magnetic field annealing can greatly enhance the magnetic permeability and GSI ratio of the samples, leading to improved sensitivity.
The development of high-performance magnetic field-sensitive materials is in urgent need for magnetic sensors. In this paper, the effect of magnetic field annealing on the soft magnetic properties, thermal stability and stress induced giant magneto-impedance (GMI) effect of Co69Fe5.5Ni1Si14.5-xPxB10 (x = 0, 0.5, 1, 1.5, 2) amorphous alloys were investigated in detail. Thermal analysis shows that replacing Si with a small amount of P can increase the thermal stability of the amorphous alloys. The permeability of the samples with magnetic field annealing is about 150% higher than that of the samples with stress-relieve annealing. The stress-induced GMI (GSI) results show that when the applied tensile stress is 0 MPa, 100 MPa, and 300 MPa, the maximum GMI ratio of the 1 at. % P-doping alloy with magnetic field annealing first increases from 76.6% to 102.8% and then decreases to 82%. Under the optimized measurement conditions, the magnetic field response sensitivity xi of the Co69Fe5.5Ni1-Si13.5P1B10 ribbon reached to 35.3%/Oe, the GSI ratio reached 34.3%, which has significant improvement compared to that of the stress-relieve annealing samples. Therefore, the magnetic field annealing technique greatly improved the GSI effect of the Co-based amorphous alloys, and the results obtained show a new way to develop high-performance GSI sensor materials and can be used in the construction of stress sensors.
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