Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing
p. 69-74
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2017
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oai:112.137.131.14:VNU_123-582862017-09-30T20:56:12Z Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing O. Thiabgoh H. Shen T. Eggers A. Galati S. Jiang J.S. Liu Z.Li J.F. Sun H. Srikanth M.H. Phan Soft ferromagnetic wires Joule annealing Magneto-impedance High frequency Magnetic sensors p. 69-74 We report an enhancement of low-field, high-frequency magneto-impedance (MI) response and circumferential domain structures of melt-extracted amorphous Co69.25Fe4.25Si13B13.5microwires by dc Joule annealing. The current amplitudes of 5 mA, 10 mA, and 20 mA were applied to amorphous microwires for different time treatments. The magnetic field dependence of impedance and circumfer-ential domain structure of the microwires were explored using an impedance analyzer over a high frequency range (20 MHze1000 MHz) and magnetic force microscopy (MFM), respectively. Conse-quently, the optimum value of 5 mA current for 20 min markedly improved the MI ratio up to 610% (1.7 times of 380% from the as-cast state) at a working frequency of 20 MHz. Moreover, the magneticfield sensitivity has been achieved up to 500%/Oe (more than two times of 225%/Oe from the as-cast one) at a frequency of 40 MHz. MFM images clearly show the development of a well-defined circumferential domain structure of the annealed microwire comparing with the as-cast one. The improvement of the high-frequency MI response in Co-rich amorphous microwires is promising for sensitive magnetic microsensors for low field detection 2017-08-24T08:43:54Z 2017-08-24T08:43:54Z 2016 Article 2468-2284 http://repository.vnu.edu.vn/handle/VNU_123/58286 en application/pdf ĐHQGHN |
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Vietnam National University, Hanoi |
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VNU Library & Information Center |
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Vietnam |
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VNU Digital Repository |
| language |
English |
| topic |
Soft ferromagnetic wires Joule annealing Magneto-impedance High frequency Magnetic sensors |
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Soft ferromagnetic wires Joule annealing Magneto-impedance High frequency Magnetic sensors O. Thiabgoh H. Shen T. Eggers A. Galati S. Jiang J.S. Liu Z.Li J.F. Sun H. Srikanth M.H. Phan Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing |
| description |
p. 69-74 |
| format |
Article |
| author |
O. Thiabgoh H. Shen T. Eggers A. Galati S. Jiang J.S. Liu Z.Li J.F. Sun H. Srikanth M.H. Phan |
| author_facet |
O. Thiabgoh H. Shen T. Eggers A. Galati S. Jiang J.S. Liu Z.Li J.F. Sun H. Srikanth M.H. Phan |
| author_sort |
O. Thiabgoh |
| title |
Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing |
| title_short |
Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing |
| title_full |
Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing |
| title_fullStr |
Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing |
| title_full_unstemmed |
Enhanced high-frequency magneto-impedance response of melt-extracted Co69.25Fe4.25Si13B13.5microwires subject to Joule annealing |
| title_sort |
enhanced high-frequency magneto-impedance response of melt-extracted co69.25fe4.25si13b13.5microwires subject to joule annealing |
| publisher |
ĐHQGHN |
| publishDate |
2017 |
| url |
http://repository.vnu.edu.vn/handle/VNU_123/58286 |
| _version_ |
1680963262816976896 |