Ferromagnetic Resonance in Magnetite Thin Films

Author

Nagata, M. ; Tanabe, Kazuki ; Moriyama, Takumi ; Chiba, D. ; Ohe, Jun-Ichiro ; Myoka, Makoto ; Niizeki, Tomohiko ; Yanagihara, Hideto ; Kita, Eiji ; Ono, Takahito

Author_Institution

Inst. for Chem. Res., Kyoto Univ., Uji, Japan

Volume

50

Issue

1

fYear

2014

fDate

Jan. 2014

Firstpage

1

Lastpage

3

Abstract

We have been investigating the spin motive force induced by magnetization dynamics in ferromagnetic materials. Ferrimagnetic materials are expected to exhibit even larger spin motive force due to their spatially staggered magnetic structure and high frequency spin wave modes. We believe that magnetite (Fe₃O₄) is one of the candidates for this purpose. Here, we report magnetic resonance in Fe₃O₄ thin films epitaxially grown on a MgO (001) substrate. The gyromagnetic ratio and the effective saturation magnetization are estimated to be 1.71 ×10¹¹ s^-1T^-1 and 364 emu/cm³, respectively. The Gilbert damping constant of 0.02 is obtained from the magnetic field dependence of the linewidth. We expect to investigate the spin motive force induced from this magnetic resonance.

Keywords

ferromagnetic materials; ferromagnetic resonance; gyromagnetic effect; iron compounds; magnetic epitaxial layers; magnetisation; Fe₃O₄; Gilbert damping constant; MgO; MgO (001) substrate; effective saturation magnetization; ferrimagnetic materials; ferromagnetic materials; ferromagnetic resonance; gyromagnetic ratio; high frequency spin wave modes; magnetic field dependence; magnetic structure; magnetite thin films; magnetization dynamics; spin motive force; Magnetic domain walls; Magnetic domains; Magnetic resonance; Magnetomechanical effects; Perpendicular magnetic anisotropy; Saturation magnetization; Magnetic layered films; magnetic resonance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2274270

Filename

6693007