Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854682
