Magnetic response of FeNbCuBSi RQ ribbons to bi-axial strain

Nanocrystalline strip samples of the FeNbCuBSi class that are macroscopical ly heterogeneous due to surface /volume differences have been investigated. This heterogeneity is found to be a general property of the class. It repr esents a base for mutual force influence between the surface and the majori ty volume beneath. The hi-axial in-plane stress exerted by the ribbon surfa ces on the volume is demonstrated first of all by a magnetoelastic anisotro py. The contribution of the creep-induced anisotropy, which can build up un der the surface stress at post-treatment temperature, is also found possibl e. (C) 2000 Elsevier Science B.V. All rights reserved.