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Observation of asymmetry in domain wall velocity under transverse magnetic field.
- Source :
- APL Materials; 2016, Vol. 4 Issue 3, p1-7, 7p
- Publication Year :
- 2016
-
Abstract
- The dynamics of a magnetic domain wall (DW) under a transverse magnetic field H<subscript>y</subscript> are investigated in two-dimensional (2D) Co/Ni microstrips, where an interfacial Dzyaloshinskii-Moriya interaction (DMI) exists with DMI vector D lying in +y direction. The DW velocity exhibits asymmetric behavior for ±H<subscript>y</subscript>; that is, the DW velocity becomes faster when H<subscript>y</subscript> is applied antiparallel to D. The key experimental results are reproduced in a 2D micromagnetic simulation, which reveals that the interfacial DMI suppresses the periodic change of the average DW angle φ even above the Walker breakdown and that H<subscript>y</subscript> changes φ, resulting in a velocity asymmetry. This suggests that the 2D DW motion, despite its microscopic complexity, simply depends on the average angle of the DW and thus can be described using a one-dimensional soliton model. These findings provide insight into the magnetic DW dynamics in 2D systems, which are important for emerging spin-orbitronic applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- MAGNETIC domain walls
MAGNETIC fields
EXCHANGE interactions (Magnetism)
Subjects
Details
- Language :
- English
- ISSN :
- 2166532X
- Volume :
- 4
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- APL Materials
- Publication Type :
- Academic Journal
- Accession number :
- 114200712
- Full Text :
- https://doi.org/10.1063/1.4944897