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Magnetic Domain Wall Oscillator With Current-Perpendicular-to-Plane Geometry
- Authors
- Seo, Soo-Man; Lee, Kyung-Jin
- Issue Date
- 10월-2011
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Current-perpendicular-to-plane (CPP) geometry; magnetic domain wall (DW); micromagnetic simulation; spin-transfer torque (STT)
- Citation
- IEEE TRANSACTIONS ON MAGNETICS, v.47, no.10, pp.3085 - 3088
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MAGNETICS
- Volume
- 47
- Number
- 10
- Start Page
- 3085
- End Page
- 3088
- ISSN
- 0018-9464
- 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.
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