S. Lepadatu
Dependence of domain-wall depinning threshold current on pinning profile
Lepadatu, S.; Vanhaverbeke, A.; Atkinson, D.; Allenspach, R.; Marrows, C.H.
Authors
A. Vanhaverbeke
Professor Del Atkinson del.atkinson@durham.ac.uk
Professor
R. Allenspach
C.H. Marrows
Abstract
We have investigated the threshold current density required for depinning a domain wall from constrictions in NiFe nanowires, which give rise to pinning potentials of fixed amplitude but variable profile. We observed it to vary linearly with the angle of the triangular constriction. These results are reproduced using micromagnetic simulations including the adiabatic and nonadiabatic spin-torque terms. By curve-fitting the calculated variations to the experimental results, we obtain the nonadiabaticity parameter β=0.04(±0.005) and current spin polarization P=0.51(±0.02).
Citation
Lepadatu, S., Vanhaverbeke, A., Atkinson, D., Allenspach, R., & Marrows, C. (2009). Dependence of domain-wall depinning threshold current on pinning profile. Physical Review Letters, 102(12), Article 127203. https://doi.org/10.1103/physrevlett.102.127203
Journal Article Type | Article |
---|---|
Publication Date | Mar 26, 2009 |
Deposit Date | Feb 3, 2012 |
Publicly Available Date | Mar 29, 2024 |
Journal | Physical Review Letters |
Print ISSN | 0031-9007 |
Electronic ISSN | 1079-7114 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 102 |
Issue | 12 |
Article Number | 127203 |
DOI | https://doi.org/10.1103/physrevlett.102.127203 |
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Copyright Statement
© 2009 American Physical Society
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