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Spin Precession Mapping at Ferromagnetic Resonance via Nuclear Resonant Scattering of Synchrotron Radiation

MPG-Autoren
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Meier,  Guido
Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany;
Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany;

Externe Ressourcen

http://dx.doi.org/10.1103/PhysRevLett.114.147601
(Verlagsversion)

http://arxiv.org/abs/1410.3689
(Preprint)

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Volltexte (frei zugänglich)

1410.3689.pdf
(Preprint), 714KB

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Zitation

Bocklage, L., Swoboda, C., Schlage, K., Wille, H.-C., Dzemiantsova, L., Bajt, S., et al. (2015). Spin Precession Mapping at Ferromagnetic Resonance via Nuclear Resonant Scattering of Synchrotron Radiation. Physical Review Letters, 114(14): 147601. doi:10.1103/PhysRevLett.114.147601.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0026-BBE4-4
Zusammenfassung
We probe the spin dynamics in a thin magnetic film at ferromagnetic resonance by nuclear resonant scattering of synchrotron radiation at the 14.4 keV resonance of Fe57. The precession of the magnetization leads to an apparent reduction of the magnetic hyperfine field acting at the Fe57 nuclei. The spin dynamics is described in a stochastic relaxation model adapted to the ferromagnetic resonance theory by Smit and Beljers to model the decay of the excited nuclear state. From the fits of the measured data, the shape of the precession cone of the spins is determined. Our results open a new perspective to determine magnetization dynamics in layered structures with very high depth resolution by employing ultrathin isotopic probe layers.