Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems

P. Klaer; F. Hoffmann; G. Woltersdorf; E. Arbelo Jorge; M. Jourdan; C. H. Back; H. J. Elmers

doi:10.1088/0022-3727/44/42/425004

Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems

P. Klaer, F. Hoffmann, G. Woltersdorf, E. Arbelo Jorge, M. Jourdan, C. H. Back, H. J. Elmers

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Time-resolved x-ray magnetic circular dichroism was used to investigate epitaxial MgO(100)/Co₂Cr_0.6Fe_0.4Al and MgO(100)/Co₂Cr_0.6Fe_0.4Al/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 L₃ 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.

Original language	English
Article number	425004
Journal	Journal of Physics D: Applied Physics
Volume	44
Issue number	42
DOIs	https://doi.org/10.1088/0022-3727/44/42/425004
State	Published - 26 Oct 2011
Externally published	Yes

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title = "Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems",

abstract = "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 L3 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.",

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T1 - Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems

AU - Klaer, P.

AU - Hoffmann, F.

AU - Woltersdorf, G.

AU - Jorge, E. Arbelo

AU - Jourdan, M.

AU - Back, C. H.

AU - Elmers, H. J.

PY - 2011/10/26

Y1 - 2011/10/26

N2 - 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 L3 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.

AB - 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 L3 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.

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Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems

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