The growth temperature and measurement temperature dependences of soft magnetic properties and effective damping parameter of (FeCo)-Al alloy thin films


The soft magnetic properties and effective damping parameters of Fe73Co25Al2 alloy thin films are discussed. The effective damping parameter alpha(eff) measured by ferromagnetic resonance for the 10 nm-thick sample is nearly constant (approximate to 0.004 +/- 0.0008) for a growth temperature T-s from ambient to 200 degrees C, and then tends to decrease for higher temperatures and alpha(eff) is 0.002 +/- 0.0004 at T-s = 300 degrees C. For the 80 nm-thick sample, the alpha(eff) seems to increase with T-s from alpha(eff) = 0.001 +/- 0.0002 at T-s = ambient to alpha(eff) = 0.002 +/- 0.0004. The alpha(eff) is found nearly constant (alpha(eff) = 0.004 +/- 0.0008) over a temperature range from 10 to 300 K for the 10 nm films with the different T-s (ambient, 100 and 200 degrees C). Together with an increasing non-linearity of the frequency dependence of the linewidth at low Ts, extrinsic contributions such as two-magnon scattering dominate the observed temperature dependence of effective damping and linewidth. (C) 2018 Author(s).

Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Physics, Applied, Science & Technology - Other Topics, Materials Science, Physics
Ariake, Y., et al. (2018): The Growth Temperature and Measurement Temperature Dependences of Soft Magnetic Properties and Effective Damping Parameter of (FeCo)-Al Alloy Thin Films. AIP Advances, 8(5). DOI: