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Exploring the accessible frequency range of phase-resolved ferromagnetic resonance detected with x-rays
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
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2013 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 113, no 3, 033904- p.Article in journal (Refereed) Published
Abstract [en]

We present time-and element-resolved measurements of the magnetization dynamics in a ferromagnetic trilayer structure. A pump-probe scheme was utilized with a microwave magnetic excitation field phase-locked to the photon bunches and x-ray magnetic circular dichroism in transmission geometry. Using a relatively large photon bunch length with a full width at half maximum of 650 ps, the precessional motion of the magnetization was resolved up to frequencies of 2.5 GHz, thereby enabling sampling at frequencies significantly above the inverse bunch length. By simulating the experimental data with a numerical model based on a forced harmonic oscillator, we obtain good correlation between the two. The model, which includes timing jitter analysis, is used to predict the accessible frequency range of x-ray detected ferromagnetic resonance.

Place, publisher, year, edition, pages
2013. Vol. 113, no 3, 033904- p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-195378DOI: 10.1063/1.4772613ISI: 000313670600041OAI: oai:DiVA.org:uu-195378DiVA: diva2:607772
Available from: 2013-02-25 Created: 2013-02-25 Last updated: 2017-12-06Bibliographically approved

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Knut, RonnyKaris, Olof

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