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RESEARCH PRODUCT
Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems
Georg WoltersdorfHans-joachim ElmersMartin JourdanE. Arbelo JorgeF. HoffmannP. KlaerChristian H. Backsubject
Spin pumpingMaterials scienceAcoustics and UltrasonicsCondensed matter physicsMagnetic circular dichroismSpin valveDichroismPhoton energyCondensed Matter PhysicsFerromagnetic resonanceSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceMagnetizationExcited statedescription
Time-resolved x-ray magnetic circular dichroism was used to investigate epitaxial MgO(100)/Co2Cr0.6Fe0.4Al and MgO(100)/Co2Cr0.6Fe0.4Al/Cr/CoFe films. The precessional motion of the individual sublattice magnetization, excited by continuous microwave excitation in the range 2–10 GHz, was detected by tuning the x-ray photon energy to the L 3 absorption edges of Cr, Fe and Co. The relative phase angle of the sublattice magnetization's response is smaller than the detection limit of 2°. A weakly antiferromagnetically coupled CoFe layer causes an increase in the ferromagnetic resonance linewidth consisting of a constant offset and a component linearly increasing with frequency that we partly attribute to non-local damping due to spin pumping.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-03 | Journal of Physics D: Applied Physics |