Magnetization Dynamics in Spin Valves

by Wegelin, Frederik
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Wegelin, Frederik Magnetization Dynamics in Spin Valves
Wegelin, Frederik - Magnetization Dynamics in Spin Valves

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Key technology applications like magnetoresistive sensors or the Magnetic Random Access Memory (MRAM) require reproducible magnetic switching mechanisms. i.e. predefined remanent states. At the same time advanced magnetic recording schemes push the magnetic switching time into the gyromagnetic regime. Objects of study in this study are antiparallel pinned synthetic spin valves as they are extensively used as read heads in today's magnetic storage devices. Results are reported of element specific Time Resolved Photo-Emission Electron Microscopy (TR-PEEM) to image the magnetization dynamics of the free layer alone via X- ray Circular Dichroism (XMCD). The observation of magnetic switching processes in the gigahertz range became possible due to the joined effort of producing ultra-short X-ray pulses at BESSY II and optimizing the wave guide design of the samples for high frequency electromagnetic excitation. It could be shown that the magnetization dynamics of the free layer of a GMR spin valve stack deviates significantly from a simple phase coherent rotation.


Wegelin, Frederik

Further information

Biography Artist:
Dr. Frederik Wegelin, geb. 1973, studierte in an der Johannes-Gutenberg Universität in Mainz Physik und forschte während Diplom- und Doktorarbeit in Entwicklungsprojekten mit IBM Speichersysteme GmbH bzw. Sensitec GmbH an den Grundlagen der modernen Magnetspeichertechnologie.
Number of Pages:
Media Type:
Südwestdeutscher Verlag für Hochschulschriften

Master Data

Product Type:
Paperback book
Package Dimensions:
0.22 x 0.15 x 0.007 m; 0.213 kg
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