A Study of Giant Magnetoimpedance Effect and Magnetic Response in Micro-patterned F/Ag/F Magnetic Ribbon Structures (F=Co-rich Amorphous Ribbon)

作者：Anh Tuan Le^*; Mai Thanh Tung; Manh Huong Phan

来源：Journal of Superconductivity and Novel Magnetism, 2012, 25(4): 1133-1138.

DOI：10.1007/s10948-011-1379-y

• Amorphous ribbons
• GMI effect
• Magnetic sensors
• Trilayer structure

The giant magnetoimpedance (GMI) effect and its field sensitivity (xi) have been investigated in micro-patterned F/Ag/F trilayer ribbon structures in the frequency range of 1-10 MHz, F stands for Co69Fe4.5X1.5Si10B15 (X=Ni, Al, Cr) amorphous ribbons. It is found that the GMI ratio and xi are enhanced in the F/Ag/F trilayer structure as compared to single-layer structure at the same condition. It has been demonstrated that the enhancement of GMI ratio and xi results mainly from the larger effective permeability due to the closed magnetic flux path and big resistivity difference between inner and outer layer in the trilayer geometry. Importantly, the maximum GMI ratio and field sensitivity reached the largest values of 104% and 12%/Oe at a measuring frequency of 4 MHz for Al-containing sample. This result makes the F/Ag/F trilayer ribbon geometry more attractive for production of high-performance GMI-based magnetic sensors than single-layer one.

• 出版日期2012-5
• 单位华中科技大学