Direct observation of Oersted-field-induced magnetization dynamics in magnetic nanowires

Abstract : We have used time-resolved x-ray photoemission electron microscopy to investigate the magnetization dynamics induced by nanosecond current pulses in NiFe/Cu/Co nanowires. The Oersted magnetic field present during the current pulses induces a large tilt of the NiFe magnetization, transverse to the wires. Spin-wave-like oscillations of the NiFe magnetization are also observed and attributed to precessional motion about the effective field. Our results clearly show that both the quasi-static and dynamic effects of the Oersted field have to be taken into account when interpreting current-induced domain wall motion in multilayered nanowires. This internal, transverse magnetic field may contribute to the increased efficiency of current-induced domain wall motion observed in NiFe/Cu/Co nanowires.
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https://hal.archives-ouvertes.fr/hal-00453804
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Submitted on : Friday, February 5, 2010 - 3:51:04 PM
Last modification on : Tuesday, June 25, 2019 - 10:40:05 AM
Long-term archiving on : Friday, June 18, 2010 - 7:09:14 PM

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  • HAL Id : hal-00453804, version 1
  • ARXIV : 1002.1302

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Vojtech Uhlîr, Stefania Pizzini, Nicolas Rougemaille, Vincent Cros, Erika Jimenez, et al.. Direct observation of Oersted-field-induced magnetization dynamics in magnetic nanowires. 2010. ⟨hal-00453804v1⟩

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