A Study of the Magnetoelastic Effect in Metallic Textured NiW_x (x = 5.5, 6.0, 7.4, and 7.7 at %) Ribbons

The dependence of differential magnetic susceptibility χ_ac(T) of metallic biaxially textured NiW_x ribbons with a tungsten content of x = 5.5, 6.0, 7.4, 7.7 at % on planar mechanical tensile and compressive stresses has been studied in the temperature range of 50–350 K. To create the tensile and compressive stresses, the thermal cycling procedure is applied to the ribbons glued to the substrates made of Si and aluminum alloy D16T, respectively. It is shown that the main peculiarities of the magnetic susceptibility behavior can be explained by magnetic orientation transitions and the occurrence of internal stresses σ(T) that exceed the elastic limit of NiW_x.