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

V. Uhlíř, S. Pizzini, N. Rougemaille, V. Cros, E. Jiménez, L. Ranno, O. Fruchart, M. Urbánek, G. Gaudin, J. Camarero, C. Tieg, F. Sirotti, E. Wagner, and J. Vogel
Phys. Rev. B 83, 020406(R) – Published 12 January 2011
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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 nanostripes. A large tilt of the NiFe magnetization in the direction transverse to the stripe is observed during the pulses. We show that this effect cannot be quantitatively understood from the amplitude of the Oersted field and the shape anisotropy. High-frequency oscillations observed at the onset of the pulses are attributed to precessional motion of the NiFe magnetization about the effective field. We discuss the possible origins of the large magnetization tilt and the potential implications of the static and dynamic effects of the Oersted field on current-induced domain-wall motion in such stripes.

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  • Received 26 November 2010

DOI:https://doi.org/10.1103/PhysRevB.83.020406

© 2011 American Physical Society

Authors & Affiliations

V. Uhlíř1,2, S. Pizzini1, N. Rougemaille1, V. Cros3, E. Jiménez4, L. Ranno1, O. Fruchart1, M. Urbánek2, G. Gaudin5, J. Camarero4, C. Tieg6, F. Sirotti7, E. Wagner1, and J. Vogel1

  • 1Institut Néel, Centre national de la recherche scientifique and Université Joseph Fourier, BP166, F-38042 Grenoble, France
  • 2Institute of Physical Engineering, Brno University of Technology, CZ-61669 Brno, Czech Republic
  • 3Unité Mixte de Physique CNRS-Thales, Route départementale 128, F-91767 Palaiseau Cedex, France
  • 4Departamento Física de la Materia Condensada, Instituto “Nicolás Cabrera” and Instituto Madrileño de Estudios Avanzados-Nanociencia, Campus Universidad Autónoma de Madrid, E-28049 Madrid, Spain
  • 5SPINTEC, UMR8191 CEA/CNRS/UJF/Grenoble INP, INAC, F-38045 Grenoble, France
  • 6European Synchrotron Radiation Facility, BP200, F-38043 Grenoble, France
  • 7Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette, France

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Issue

Vol. 83, Iss. 2 — 1 January 2011

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