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Lepadatu S, Saarikoski H, Beacham R, et al. Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion. Sci Rep. 2017;7(1):1640doi: 10.1038/s41598-017-01748-7.
Lepadatu, S., Saarikoski, H., Beacham, R., Benitez, M. J., Moore, T. A., Burnell, G., Sugimoto, S., Yesudas, D., Wheeler, M. C., Miguel, J., Dhesi, S. S., McGrouther, D., McVitie, S., Tatara, G., & Marrows, C. H. (2017). Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion. Scientific reports, 7(1), 1640. https://doi.org/10.1038/s41598-017-01748-7
Lepadatu, Serban, et al. "Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion." Scientific reports vol. 7,1 (2017): 1640. doi: https://doi.org/10.1038/s41598-017-01748-7
Lepadatu S, Saarikoski H, Beacham R, Benitez MJ, Moore TA, Burnell G, Sugimoto S, Yesudas D, Wheeler MC, Miguel J, Dhesi SS, McGrouther D, McVitie S, Tatara G, Marrows CH. Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion. Sci Rep. 2017 May 09;7(1):1640. doi: 10.1038/s41598-017-01748-7. PMID: 28487513; PMCID: PMC5431626.
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Sci Rep. 2017 May 09;7(1):1640. doi: 10.1038/s41598-017-01748-7.

Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion.

Scientific reports

Serban Lepadatu, Henri Saarikoski, Robert Beacham, Maria Jose Benitez, Thomas A Moore, Gavin Burnell, Satoshi Sugimoto, Daniel Yesudas, May C Wheeler, Jorge Miguel, Sarnjeet S Dhesi, Damien McGrouther, Stephen McVitie, Gen Tatara, Christopher H Marrows

Affiliations

  1. School of Physics & Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom.
  2. Jeremiah Horrocks Institute for Mathematics, Physics & Astronomy, University of Central Lancashire, Preston, Lancashire, PR1 2HE, United Kingdom.
  3. RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
  4. Scottish Universities Physics Alliance, School of Physics & Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom.
  5. Departamento de Física, Escuela Politécnica Nacional, Quito, Ecuador.
  6. Diamond Light Source, Chilton, Didcot, OX11 0DE, United Kingdom.
  7. School of Physics & Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom. [email protected].

PMID: 28487513 PMCID: PMC5431626 DOI: 10.1038/s41598-017-01748-7

Abstract

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 spin-polarised 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 Néel wall structures, imaged using photoemission electron and Lorentz transmission electron microscopy, with a width of only ~100 nm. The measured critical current density to set these walls in motion, detected using magnetotransport measurements, is 1.0 × 10

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