Hickey, M.C., Ngo, D.-T., Lepatadu, S., Atkinson, D., McGrouther, D. , McVitie, S. and Marrows, C.H. (2010) Spin-transfer torque efficiency measured using a Permalloy nanobridge. Applied Physics Letters, 97(20), p. 202505. (doi: 10.1063/1.3520144)
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Publisher's URL: http://dx.doi.org/10.1063/1.3520144
Abstract
We report magnetoresistance, focused Kerr effect, and Lorentz microscopy experiments performed on a nanoscale Permalloy bridge connecting microscale pads. These pads can be switched from a parallel to antiparallel state through the application of small fields, causing a detectable magnetoresistance. We show that this switching field H<sub>sw</sub> is modified by the application of a high current density (J<sub>dc</sub>) through spin-transfer torque effects, caused by the spin-current interacting with the magnetization gradients generated by the device geometry, yielding an estimate for the spin-transfer torque efficiency xi=dH<sub>sw</sub>/dJ<sub>dc</sub>=0.027 +/- 0.001 Oe/MA cm(-2).
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | McVitie, Professor Stephen and McGrouther, Dr Damien |
| Authors: | Hickey, M.C., Ngo, D.-T., Lepatadu, S., Atkinson, D., McGrouther, D., McVitie, S., and Marrows, C.H. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Applied Physics Letters |
| Journal Abbr.: | Appl. Phys. Lett. |
| ISSN: | 0003-6951 |
| ISSN (Online): | 1077-3118 |
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