Abstract
Field-annealed Co-based commercial amorphous ribbons (Metglas® 2714A) with single strip structure and tortuous shape are fabricated by MEMS technology. The influence of the size, magnetic field and frequency on the giant magnetoimpedance (GMI) ratio of the ribbons with single strip structure and tortuous shape is investigated. The results show that the GMI ratio of micro-patterned Co-based amorphous ribbons with single strip structure increases with increasing in length and decreases with the increasing in width. The ribbons (length = 10 mm, width = 250 μm) with single strip can get higher GMI ratio at lower frequency (<40 MHz). The GMI ratio of micro-patterned tortuous-shaped Co-based amorphous ribbon with six turns is biggest with 82 %, obtained at a frequency of 40 MHz and a field of 20 Oe, and the GMI ratio increases with the increasing in turn number from two turns to six turns. All mechanisms (line width and tortuous shape) that influence the inductance and resistance will result in changes in the impedance and the GMI effect. The anisotropy field HK (15–20 Oe) of tortuous shape ribbon that the peak GMI ratio is larger than that (5–10 Oe) of the ribbon with single strip structure. The effect of the frequency on the GMI ratio of the ribbons with tortuous shape is more complex. This can be explanation by complex inductance of tortuous shape ribbons.
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Acknowledgments
This work was supported by The National Natural Science Foundation of China (No. 61074168 and No. 61273065), National Science and Technology Support Program (2012BAK08B05), National Key Laboratory Research Fund (9140C790403110C7905), Natural Science Foundation of Shanghai (13ZR1420800) and the Analytical and Testing Center in Shanghai Jiao Tong University.
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Yang, Z., Lei, C., Zhou, Y. et al. Study on the giant magnetoimpedance effect in micro-patterned Co-based amorphous ribbons with single strip structure and tortuous shape. Microsyst Technol 21, 1995–2001 (2015). https://doi.org/10.1007/s00542-014-2342-1
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DOI: https://doi.org/10.1007/s00542-014-2342-1