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Dynamics of magnetic stray fields at initial stage of magnetization reversal of micrometer-sized Co dots

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Abstract

The dynamical evolution of magnetic stray fields has been investigated at the initial stage of magnetization reversal of a microstructured cobalt film (Co dots). Quantitative measurements of the domain magnetization and of the shift of the domain boundaries have been performed at 1 ns intervals. The measurements were performed using an emission electron microscope. The photoelectrons were excited from a sample using well-defined synchrotron-radiation pulses in single bunch operation mode (UE56/1-PGM at BESSY II, Berlin). The magnetization movement was initiated by an external magnetic field pulse, the pulse width being 8 ns. The magnetic field pulse was synchronized with the synchrotron single bunch radiation pulses. The lateral and time resolutions of the applied pulses were 50 nm and 500 ps, respectively.

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Authors and Affiliations

  1. Institut für Physik, Johannes Gutenberg-Universität, 55099, Mainz, Germany

    A. Krasyuk, A. Oelsner, S.A. Nepijko & G. Schönhense

  2. Institute of Physics, National Academy of Sciences of Ukraine, pr. Nauki 46, 03039, Kiev, Germany

    S.A. Nepijko

  3. The Moscow Military Institute, Golovachev str., 109380, Moscow, Germany

    N.N. Sedov

  4. Leibniz-Institut für Festkörper- und Werkstoffforschung, 01069, Dresden, Germany

    A. Kuksov & C.M. Schneider

  5. GST mbH, Alexander-Fleming-Str. 65, 55130, Mainz, Germany

    G. Schönhense

Authors
  1. A. Krasyuk
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  2. A. Oelsner
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  3. S.A. Nepijko
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  4. N.N. Sedov
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  5. A. Kuksov
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  6. C.M. Schneider
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  7. G. Schönhense
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Correspondence to S.A. Nepijko.

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PACS

31.70.Hq; 68.37.Xy; 75.70.-i; 75.75.+a

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Krasyuk, A., Oelsner, A., Nepijko, S. et al. Dynamics of magnetic stray fields at initial stage of magnetization reversal of micrometer-sized Co dots. Appl. Phys. A 79, 1925–1930 (2004). https://doi.org/10.1007/s00339-004-2637-7

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  • DOI: https://doi.org/10.1007/s00339-004-2637-7

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