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Longitudinal detection of ferromagnetic resonance using x-ray transmission measurements

AuthorsBoero, G.; Rusponi, S.; Kavich, J.; Lodi Rizzini, A. ; Piamonteze, C.; Nolting, F.; Tieg, C.; Thiele, J. U.; Gambardella, Pietro
Issue Date3-Dec-2009
PublisherAmerican Institute of Physics
CitationReview of Scientific Instruments Beta 80(12): 123902 (2009)
AbstractWe describe a setup for the x-ray detection of ferromagnetic resonance in the longitudinal geometry using element-specific transmission measurements. Thin magnetic film samples are placed in a static magnetic field collinear with the propagation direction of a polarized soft x-ray beam and driven to ferromagnetic resonance by a continuous wave microwave magnetic field perpendicular to it. The transmitted photon flux is measured both as a function of the x-ray photon energy and as a function of the applied static magnetic field. We report experiments performed on a 15 nm film of doped Permalloy (Ni73Fe18Gd7Co2) at the L3/L2-edges of Fe, Co, and Ni. The achieved ferromagnetic resonance sensitivity is about 0.1 monolayers/ (raiz cuadrada de Hz). The obtained results are interpreted in the framework of a conductivity tensor based formalism. The factors limiting the sensitivity as well as different approaches for the x-ray detection of ferromagnetic resonance are discussed.
Description11 pages, 6 figures, 1 table, 1 appendix.
Publisher version (URL)http://dx.doi.org/10.1063/1.3267192
Appears in Collections:(CIN2) Artículos
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