The Effect of Fe Substitution on the Magnetization Behavior at Low Temperatures in Amorphous FexNi80−xB12Si8 Ribbons (x=0.10 to 16)

Abstract

Amorphous FexNi[Formula: see text]B[Formula: see text]Si8 alloys ([Formula: see text] to 16) were fabricated by employing wheel melt spinning process. Measurements of magnetization were made over temperature range of 4.20–360[Formula: see text]K and with an applied magnetic field up to 160[Formula: see text]kOe. By making a substitution Ni by Fe, the [Formula: see text] (Curie temperature) was actually discovered to rise. The spin wave (SW) theory was used to examine the magnetism at low temperatures. At low temperatures (4.20[Formula: see text]K), magnetization curves were found to obey Bloch’s [Formula: see text] law. Certain important parameters were determined, such as the constant D (SW stiffness) and the distance between interatomic transition metals [Formula: see text] for the different compositions. We employed the law of approach to magnetic saturation to obtain some important parameters, including a random magnetic anisotropy constant [Formula: see text] and then the anisotropy local correlation length. So, it’s worth noting that as Fe concentration rises, the exchange constants, random magnetic anisotropy constant [Formula: see text], and also the ferromagnetic correlation [Formula: see text] rise.