<P>The influence of annealing and of wire geometry on the giant magnetoimpedance (GMI) effect in a glass-coated microwire LC-resonator were systematically investigated. It was found that annealing magnetic microwires significantly varied the per...
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https://www.riss.kr/link?id=A107531644
2007
-
SCOPUS,SCIE
학술저널
4582-4585(4쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>The influence of annealing and of wire geometry on the giant magnetoimpedance (GMI) effect in a glass-coated microwire LC-resonator were systematically investigated. It was found that annealing magnetic microwires significantly varied the per...
<P>The influence of annealing and of wire geometry on the giant magnetoimpedance (GMI) effect in a glass-coated microwire LC-resonator were systematically investigated. It was found that annealing magnetic microwires significantly varied the permeability and hence the GMI ratio, whereas the magnetoimpedance response was sensitively altered with varying wire geometry of the LC-resonator. The magnitude of GMI is determined by the soft magnetic characteristics of the microwire and the effect of LC-resonance, while the multiple-peak GMI feature can be attributed to the LC-resonance circuit and the formation of standing magnetic waves within the sample. Interestingly, the GMI ratio reached the largest values of 400 000% and 270 000% at the resonance frequencies of 518.51 MHz and 146.32 MHz for Co<SUB>83.2</SUB>B<SUB>3.3</SUB>Si<SUB>5.9</SUB>Mn<SUB>7.6</SUB> and Co<SUB>67</SUB>Fe<SUB>3.8</SUB>Ni<SUB>1.4</SUB>B<SUB>11.5</SUB>Si<SUB>14.6</SUB>Mo<SUB>1.7</SUB> samples, respectively. The corresponding magnetic-field sensitivities of GMI are about 218 000%/Oe and 135 000%/Oe. These results are interesting for the development of a new family of ultra-sensitive and high-frequency magnetic sensors. The feature of a LC-resonance circuit can be used for improving the sensitivity of GMI-based magnetic sensors while selecting the working frequency.</P>