Acremann, Y. and Kashuba, A. and Buess, Matthias and Pescia, D. and Back, Christian (2002) Magnetic Spatial Non-Uniformities on the Picosecond Timescale. Journal of Magnetism and Magnetic Materials 239 (1-3), pp. 346-350.
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The magnetization of a Co disk with an in-plane flux-closure domain structure was subject to a picosecond magnetic field pulse perpendicular to the plane. Images with sub-micron spatial resolution have been recorded every 10 ps which reveal magnetic non-uniformities of the ferromagnetic resonance (FMR) response. A detailed analysis of the images shows a difference in the FMR frequencies of about 10% as a function of radius. In addition, the magnetization at the edge responds earlier to the applied field pulse. We discuss possible origins of these phenomena.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back|
|Keywords:||Ferromagnetic resonance; Scanning kerr microscopy|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 21:04|