Journal
PHYSICAL REVIEW B
Volume 81, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.224418
Keywords
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Funding
- Acciones Integradas Programme [HF2007-0071]
- Spanish MEC [MAT2006-13470, CSD 2007-00010]
- Czech Ministry of Education [LA287]
- Dynawall [ANR-07-NANO-034]
- [MSM0021630508]
- [KAN400100701]
- [2E13800101-MSMT]
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Very large average velocities, up to 600 m/s, have been found for domain-wall motion driven by 3-ns-long pulses of electric current in zero magnetic field in the NiFe layer of 200-nm-wide NiFe/Cu/Co nanowires. For longer pulses, the domain-wall motion is strongly hindered by pinning potentials. Dipolar interactions between the NiFe and Co layers caused by anisotropy inhomogeneities have been identified as the most important among the different potential sources of DW pinning. The domain-wall velocities increase with current density, but a substantial drop is observed at current densities above 4 x 10(11) A/m(2).
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