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

Volume

47

Issue

12

fYear

2011

Firstpage

4682

Lastpage

4685

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2158847

Filename

5784334