Journal article · Preprint article
Nonadiabatic Spin Torque Investigated Using Thermally Activated Magnetic Domain Wall Dynamics
In
Physical Review Letters
—
2010, Volume 105, Issue 5, pp. 056601
Abstract
Using transmission electron microscopy, we investigate the thermally activated motion of domain walls (DWs) between two positions in Permalloy (Ni80Fe20) nanowires at room temperature. We show that this purely thermal motion is well described by an Arrhenius law, allowing for a description of the DW as a quasiparticle in a one-dimensional potential landscape.
By injecting small currents, the potential is modified, allowing for the determination of the nonadiabatic spin torque: βt=0.010±0.004 for a transverse DW and βv=0.073±0.026 for a vortex DW. The larger value is attributed to the higher magnetization gradients present.
| Language: | English |
|---|---|
| Year: | 2010 |
| Pages: | 056601 |
| ISSN: | 10797114 and 00319007 |
| Types: | Journal article and Preprint article |
| DOI: | 10.1103/PhysRevLett.105.056601 |
| ORCIDs: | Kasama, Takeshi |
Keywords
