Title :
Q-Band Ferromagnetic Resonance Study of Fe Thin Films on GaAs(001) Deposited by RF Magnetron Sputtering
Author :
Takahashi, Yutaka ; Ikeya, Hirokazu ; Inaba, Nobuyuki ; Kirino, Fumiyoshi ; Ohtake, Mitsuru ; Futamoto, Masaaki
Author_Institution :
Dept. of Electr. Eng., Yamagata Univ., Yonezawa, Japan
Abstract :
The magnetic properties of epitaxial Fe(001) films, prepared on GaAs(001) substrates by RF magnetron sputtering, were investigated by ferromagnetic resonance spectroscopy operating at Q-band (35 GHz). The in-plane angle dependence of the resonance fields showed four-fold magnetic anisotropy with an easy (hard) direction along [100] ([110]). The anisotropy constant was slightly smaller than the magnetocrystalline anisotropy constant of bulk Fe. Ferromagnetic resonance linewidths, caused by the magnetic damping of Fe films, were narrow (<;70 Oe) and independent of the in-plane magnetic field directions. It will be shown that the observed linewidth gives good estimate of the upper bound of the Gilbert-type damping in Fe thin films.
Keywords :
ferromagnetic resonance; gallium arsenide; iron; magnetic anisotropy; magnetic epitaxial layers; metallic epitaxial layers; sputter deposition; Fe; GaAs; Gilbert type damping; Q-band ferromagnetic resonance spectroscopy; RF magnetron sputtering; angle dependence; epitaxial films; four fold magnetic anisotropy; frequency 35 GHz; magnetic damping; magnetocrystalline anisotropy constant; Damping; Gallium arsenide; Iron; Magnetic resonance; Magnetoelectronics; Fe; GaAs; Gilbert damping; ferromagnetic resonance; spintronics;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2158847
