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

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.020406· OSTI ID:21538059

Uhlir, V ^[1]; Pizzini, S; Rougemaille, N; Ranno, L; Fruchart, O; Wagner, E; Vogel, J ^[1]; Cros, V ^[2]; Jimenez, E; Camarero, J ^[3]; Urbanek, M ^[4]; Gaudin, G ^[5]; Tieg, C ^[6]; Sirotti, F ^[7]

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1. Institut Neel, Centre national de la recherche scientifique and Universite Joseph Fourier, BP166, F-38042 Grenoble (France)
2. Unite Mixte de Physique CNRS-Thales, Route departementale 128, F-91767 Palaiseau Cedex (France)
3. Departamento Fisica de la Materia Condensada, Instituto ''Nicolas Cabrera'' and Instituto Madrileno de Estudios Avanzados-Nanociencia, Campus Universidad Autonoma de Madrid, E-28049 Madrid (Spain)
4. Institute of Physical Engineering, Brno University of Technology, CZ-61669 Brno (Czech Republic)
5. SPINTEC, UMR8191 CEA/CNRS/UJF/Grenoble INP, INAC, F-38045 Grenoble (France)
6. European Synchrotron Radiation Facility, BP200, F-38043 Grenoble (France)
7. Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette (France)

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.

• OSTI ID: 21538059
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevB.83.020406; (c) 2011 American Institute of Physics; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLITUDES
ANISOTROPY
COBALT
COPPER
ELECTRON MICROSCOPY
IRON ALLOYS
MAGNETIC FIELDS
MAGNETIZATION
NICKEL ALLOYS
OSCILLATIONS
PHOTOEMISSION
PULSES
TIME RESOLUTION
X RADIATION
ALLOYS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
IONIZING RADIATIONS
METALS
MICROSCOPY
RADIATIONS
RESOLUTION
SECONDARY EMISSION
TIMING PROPERTIES
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS