| Abstrakt: |
Amorphous FexNi 8 0 − x B 1 2 Si8 alloys (x = 0. 1 0 to 16) were fabricated by employing wheel melt spinning process. Measurements of magnetization were made over temperature range of 4.20–360 K and with an applied magnetic field up to 160 kOe. By making a substitution Ni by Fe, the T C (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 K), magnetization curves were found to obey Bloch's T 3 ∕ 2 law. Certain important parameters were determined, such as the constant D (SW stiffness) and the distance between interatomic transition metals (r TM − TM ) for the different compositions. We employed the law of approach to magnetic saturation to obtain some important parameters, including a random magnetic anisotropy constant (K L) and then the anisotropy local correlation length. So, it's worth noting that as Fe concentration rises, the exchange constants, random magnetic anisotropy constant (K L) , and also the ferromagnetic correlation (R f) rise. [ABSTRACT FROM AUTHOR] |
