Influence of current amplitude on the nonlinear asymmetric ac volt–ampere characteristics in amorphous ribbons with GMI effect

• Published in: Journal of magnetism and magnetic materials 2009-05, Vol.321 (9), p.1272-1275
• Main Authors: Chai, X.L., Zeng, D.C., Liu, G.X., Yu, H.Y., Zhong, X.C., Liu, Z.W.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Fourier analysis; Giant magnetoimpedance effect; Giant magnetoresistance; Magnetic properties and materials; Magnetotransport phenomena, materials for magnetotransport; Nonlinear asymmetric volt–ampere characteristic; Physics; Sensor
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2008.11.007

Asymmetric giant magnetoimpedance (GMI) effect in amorphous ribbons is very promising due to its possible application in developing the highly sensitive linear magnetic-field sensors. In this paper, the model of the nonlinear asymmetric volt–ampere characteristics in field-biased Co-based amorphous ribbon has been established through the time derivative of the longitudinal magnetization component in the ribbon. Its harmonics are also developed by Fourier analysis. The influence of the current amplitude on the nonlinear asymmetric effect has been studied. It is found that when the current amplitude is 8.54 mA, the sensitivity of the first harmonic voltage on the external field is equal to that of the second harmonic voltage. The results obtained are useful for developing the high-sensitive magnetic-field sensors.