ΔE effect and magnetomechanical coupling factor in Fe80B20and Fe78Si10B12glassy ribbons

Abstract
Field annealing experiments on amorphous Fe80B20ribbon (Metglas 2605) and amorphous Fe78Si10B12ribbon (Tsuya, Tohoku University) are reported. The maximum magnetomechanical coupling constant,k, and change in Young's modulus, &E/E0found in Fe80B20were 0.64 and 0.87, respectively, for an anneal of 376& for 6 min in a field of 2.0T. The maximumkfor Fe78Si10B12was found to be 0.82, following a similar anneal at 373&C. This is higher than 0.75 reported by Tsuya and Arai for Fe78Si10B12, previously the highest known for any material.