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Spatially resolved observation of uniform precession modes in spin-valve systems
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color) (a–c) Temporal profile of the response of the NiFe magnetization on the field pulse (d). The XMCD signal has been integrated over small areas (marked in the insets) within the magnetic structure yielding the highest response. The field and light incidence direction are marked by the red and orange arrows, respectively. All curves have been offset by the equilibrium XMCD value. (Inset) Equilibrium magnetization configuration of both layers for each configuration. (d) Macrospin simulation of the three components of the free layer of a spin–valve system initially aligned parallel to x and excited by a magnetic field pulse parallel to the y direction. Mx and Mz are multiplied by a factor of 5 and 10, respectively.

Image of FIG. 2.
FIG. 2.

(Color) (a) Phase-resolved XMCD signals acquired with excitation frequencies of 1.5, 2.0, and 2.5 GHz together with a sine fit. The signals have been integrated over the box marked in the inset and normalized to the excitation amplitude measured from the image shift. (b) Theoretical frequency dependence of oscillation amplitude and phase as acquired from a macrospin simulation. Experimental values are marked with crosses.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spatially resolved observation of uniform precession modes in spin-valve systems