Current-induced domain wall motion in Ni80Fe20 nanowires with low depinning fields

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2010
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Lörincz, Andreas
Boulle, Olivier
Rhensius, Jan
Heyderman, Laura Jane
Cho, Young Jin
Seo, Sunae
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Journal of Physics D. Applied Physics. 2010, 43, 045003. Available under: doi: 10.1088/0022-3727/43/4/045003
Zusammenfassung

In this paper, we report on domain wall (DW) motion induced by current pulses at variable temperature in 900 nm wide and 25 nm thick Ni80Fe20 wires with low pinning fields. By using Ar ion milling to pattern our wires rather than the conventional lift-off technique, a depinning field as low as ∼2 3 Oe at room temperature is obtained. Comparison with previous results acquired on similar wires with much higher pinning shows that the critical current density scales with the depinning field, leading to a critical current density of ∼2.5 × 1011Am−2 at 250 K. Moreover, when a current pulse with a current density larger than the critical current density is injected, the DW is not necessarily depinned but it can undergo a modification of its spin structure which hinders current-induced DW motion. Hence, reliable propagation of the DW requires an accurate adjustment of the pulsed current density.

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ISO 690MALINOWSKI, Gregory, Andreas LÖRINCZ, Stephen KRZYK, Philipp MÖHRKE, Daniel BEDAU, Olivier BOULLE, Jan RHENSIUS, Laura Jane HEYDERMAN, Young Jin CHO, Sunae SEO, Mathias KLÄUI, 2010. Current-induced domain wall motion in Ni80Fe20 nanowires with low depinning fields. In: Journal of Physics D. Applied Physics. 2010, 43, 045003. Available under: doi: 10.1088/0022-3727/43/4/045003
BibTex
@article{Malinowski2010Curre-4963,
  year={2010},
  doi={10.1088/0022-3727/43/4/045003},
  title={Current-induced domain wall motion in Ni80Fe20 nanowires with low depinning fields},
  volume={43},
  journal={Journal of Physics D.  Applied Physics},
  author={Malinowski, Gregory and Lörincz, Andreas and Krzyk, Stephen and Möhrke, Philipp and Bedau, Daniel and Boulle, Olivier and Rhensius, Jan and Heyderman, Laura Jane and Cho, Young Jin and Seo, Sunae and Kläui, Mathias},
  note={Article Number: 045003}
}
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