Damping parameter and wall velocity of RE-TM films

Author

Kobayashi, Tadashi ; Hayashi, Hideaki ; Fujiwara, Yuji ; Shiomi, Shigeru

Author_Institution

Dept. of Phys. Eng., Mie Univ., Japan

Volume

41

Issue

10

fYear

2005

Firstpage

2848

Lastpage

2850

Abstract

The temperature dependence of the Gilbert damping parameter and domain wall velocity of ferrimagnetic rare earth-3d transition metal alloy (RE-TM) films are discussed. The Gilbert damping parameter is assumed to be inversely proportional to the net angular momentum of the RE-TM. Under this assumption, wall velocity is simulated. In the case of wall motion utilizing the temperature gradient of wall energy, the wall velocity reaches a maximum in the vicinity of the angular momentum compensation temperature of the RE-TM.

Keywords

damping; ferrimagnetic materials; magnetic domain walls; magneto-optical recording; transition metal alloys; Gilbert damping parameter; RE-TM films; angular momentum compensation; domain wall velocity; ferrimagnetic material; magnetooptic recording; rare earth-3D transition metal alloy; temperature gradient; Damping; Equations; Ferrimagnetic films; Ferrimagnetic materials; Gyromagnetism; Magnetic domain walls; Magnetic films; Magnetic resonance; Magnetization; Temperature dependence; Damping parameter; RE-TM; magnetooptic recording; wall velocity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.854682

Filename

1519138