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Enhancement of GMI Effect in Silicon Steels by Furnace Annealing |
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| Authors: | CSirisathitkul PJantaratana Magnet Laboratory Molecular Technology Research Unit School of Science Walailak University Nakon Si Tham-marat Thail Electricity Magnetism Properties Research Laboratory |
| Affiliation: | C.Sirisathitkul1), P.Jantaratana2) 1)Magnet Laboratory,Molecular Technology Research Unit,School of Science,Walailak University,Nakon Si Tham-marat 80161,Thail, 2)Electricity , Magnetism Properties Research Laboratory,Department of Physics,Faculty of Science,Kasetsart University,Bangkok 10900,Thail, |
| Abstract: | The ratio and sensitivity of giant magnetoimpedance(GMI)in grain oriented silicon steels(Fe-4.5%Si)are improved after furnace annealing in air for 20 min.By annealing at 800-C,the GMI sensitivity rises from 1.29%/Oe to 1.91%/Oe and the ratio increases from 237%to 294%with decreasing characteristic frequency. The results are attributable to an increase in the transverse magnetic permeability during the heat treatment. From simulation by finite element method,the GMI e-ect can be interpreted as the modificati... |
| Keywords: | Silicon steels Giant magnetoimpedance Furnace annealing Skin depth Transverse permeability |
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