Ultralow magnetic damping of a common metallic ferromagnetic film
Published Date: 2/1/2021
Source: phys.org
Ultralow damping is of key importance for spintronic and spin-orbitronic applications in a range of magnetic materials. However, the number of materials that are suited for charge-based spintronic and spin-orbitronic applications are limited due to magnon-electron scattering. To quantitatively calculate the transition metallic ferromagnetic damping, researchers have proposed theoretical approaches including the breathing Fermi surface model (to describe dissipative magnetization dynamics), generalized torque correlation model, scattering theory, and the linear response damping model. In a new report now published on Science Advances, Yangping Wei and a team of scientists in science, magnetism and magnetic materials, and chemical engineering in China and Singapore experimentally detailed a damping parameter approaching 1.5 x 10-3 for traditional, fundamental iron aluminide (FeAl) soft ferromagnets. The results were comparable to those of 3-D transition metallic ferromagnets based on the principle of minimum electron density of states.