This letter reports the giant magnetoimpedance (GMI) effect and its magnetic response in optimized Co70Fe5Si15Nb2.2Cu0.8B7 amorphous and Fe71Al2Si14B8.5Cu1Nb3.5 nanocrystalline ribbons. At a given frequency of 5 MHz, the largest GMI ratios of 513% and 640% were observed for the Co-based amorphous and Fe-based nanocrystalline samples, respectively. More interestingly, the magnetic response reached the largest value of 144%/Oe at the frequency of 4 MHz for the Co-based amorphous sample and of 40%/Oe at the frequency of 5 MHz for the Fe-based nanocrystalline sample. This is ideal for high-frequency and high-performance GMI-based sensor applications. The skin effect model was used to interpret the obtained results of GMI in connection with the magnetic-field and frequency dependences of the longitudinal permeability.
|Translated title of the contribution||Optimized giant magnetoimpedance effect in amorphous and nanocrystalline materials|
|Pages (from-to)||08C505-1 - 08C505-3|
|Number of pages||3|
|Journal||Journal of Applied Physics|
|Publication status||Published - Apr 2006|
Bibliographical notePublisher: American Institute of Physics
Other identifier: 08C505