Effect of biasing magnetic field on the complex permeability of nanocrystalline Fe86Zr7B6Cu1 alloy

The complex permeability has been measured versus frequency for nanocrystalline Fe86Zr7B6CU, ribbons with the grain size from 11.2 to 107.2 nm under biasing DC magnetic field. It is shown that the effects of the biasing dc magnetic field on the initial permeability Pi, the relaxation frequency f(0), and the mu(i)f0 product of nanocrystalline Fe86Zr7B6CU, alloy relate to its grain size. The perpendicular biasing field leads to the decrease of pi and the increase of f(0) for the ribbons with the grain size less than 25 nm and has no apparent effect on mu(i) and f(0) for the ribbons with the grain size more than 25 nm. The parallel biasing field results in the decrease of pi and the increase of f(0) for the ribbons with the grain size more than 25 nm and has no apparent effect on pi and f(0) for the ribbons with the grain size less than 25 nm. The biasing magnetic field is not a relevant parameter to mu(i)f(0). (c) 2006 Elsevier B.V. All rights reserved.