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Lepadatu, Serban and Saarikoski, Henri and Beacham, Robert and Benitez, Maria Jose and Moore, Thomas A and Burnell, Gavin and Sugimoto, Satoshi and Yesudas, Daniel and Wheeler, May C et al Data associated with 'Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion'. [DataSet]
Description
Domain walls in ferromagnetic nanowires are potential building-blocks of future technologies such as racetrack memories, in which data encoded in the domain walls are transported using spinpolarised currents. However, the development of energy-efficient devices has been hampered by the high current densities needed to initiate domain wall motion. We show here that a remarkable reduction in the critical current density can be achieved for in-plane magnetised coupled domain walls in CoFe/Ru/CoFe synthetic ferrimagnet tracks. The antiferromagnetic exchange coupling between the layers leads to simple N´eel wall structures with a width of only ∼ 100 nm. The measured critical current density to set these walls in motion is 1.0 × 1011 Am−2 , almost an order of magnitude lower than in a ferromagnetically coupled control sample. Theoretical modelling indicates that this is due to nonadiabatic driving of anisotropically coupled walls, a mechanism that can be used to design efficient domain-wall devices.
| Research / Data Type: | Collection - various types |
|---|---|
| DOI: | 10.17030/uclan.data.00000271 |
| Depositing User: | CLoK admin |
| Date Deposited: | 30 Sep 2020 14:11 |
| Revision: | 15 |
| URI: | https://uclandata.uclan.ac.uk/id/eprint/271 |
Related Resources
Data associated ... in wall motion' |
