Date of Original Version
Copyright2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article may be found at http://dx.doi.org/10.1063/1.3540403
Abstract or Description
We report on the giant magnetoimpedance (GMI) effect and its field sensitivity (η) in amorphous and nanocrystalline (Co1−xFex)89Zr7B4 ribbons with x = 0, 0.025, 0.05, and 0.10. The nanocrystalline samples were obtained by annealingamorphous ribbons in a field of 2 T applied perpendicular to the ribbon axis. We find that for the amorphous samples the GMI ratio tends to decrease with Fe doping, while the largest value of η is achieved for the x = 0.025 composition. For the nanocrystalline samples, the GMI ratio and η first decrease with increase of Fe-doped content from x = 0 to x = 0.05 and then increase for x = 0.1. The field annealing significantly enhances the GMI ratio and η in the nanocrystalline samples with x = 0 and 0.1, but decreases the η in the nanocrystalline samples with x = 0.025 and 0.05. The variations of the GMI ratio and the field-induced magnetic anisotropy field (HK) upon Fe doping are correlated with the microstructural changes in the nanocrystalline samples.
Journal of Applied Physics, 109, 7, 07B508.