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.
| Original language | English |
|---|---|
| Article number | 6027796 |
| Pages (from-to) | 3085-3088 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 47 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2011 Oct |
Bibliographical note
Funding Information:This work was supported in part by the IT R&D program of MKE/KEIT under Grant 2009-F-004-01 and the Korea Science and Engineering Foundation (KOSEF) through the basic research program funded by the Ministry of Science and Technology, Korea, under Contract 2010-0023798.
Keywords
- Current-perpendicular-to-plane (CPP) geometry
- magnetic domain wall (DW)
- micromagnetic simulation
- spin-transfer torque (STT)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering