Magnetic Domain Wall Oscillator With Current-Perpendicular-to-Plane Geometry

Author

Soo-Man Seo ; Kyung-Jin Lee

Author_Institution

Dept. of Mater. Sci. & Eng., Korea Univ., Seoul, South Korea

Volume

47

Issue

10

fYear

2011

Firstpage

3085

Lastpage

3088

Abstract

By means of analytical 1-D model and full micromagnetic simulation, we investigated the magnetic domain wall (DW) oscillator with current-perpendicular-to-plane geometry. We found that the DW oscillation frequency linearly increases with the applying current density, but drops above a certain threshold. This frequency drop is caused by the deformation of DW due to spin-transfer torque. We found that by applying an external perpendicular magnetic field in addition to the current, this deformation and the frequency drop can be suppressed, which allows obtaining a reliable frequency range for the device application.

Keywords

current density; deformation; magnetic devices; magnetic domain walls; micromagnetics; oscillators; reliability; torque; analytical 1D model; current density; current-perpendicular-to-plane geometry; deformation; magnetic domain wall oscillator; micromagnetic simulation; spin-transfer torque; Analytical models; Geometry; Magnetic domain walls; Magnetic domains; Magnetic multilayers; Magnetization; Oscillators; Current-perpendicular-to-plane (CPP) geometry; magnetic domain wall (DW); micromagnetic simulation; spin-transfer torque (STT);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2158398

Filename

6027796