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Pulsed inductive measurement of ultrafast magnetization dynamics in interlayer exchange coupled films
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View: Figures


Image of FIG. 1.
FIG. 1.

Bilinear and biquadratic coupling constants of the trilayers vs interlayer thickness .

Image of FIG. 2.
FIG. 2.

Easy axis magnetization curve of the coupled layer system measured by VSM. The solid line shows the simulated magnetization curve. The arrows show the different states of the magnetizations, obtained from the simulation. The frequencies of the optical mode (엯) in antiparallel configuration and acoustical mode (Δ) in canted and parallel configurations were deduced from the FFT of the time-domain PIMM data.

Image of FIG. 3.
FIG. 3.

VNA-FMR measurements of the trilayer. The optical mode can be detected up to much higher fields with this measurement method.

Image of FIG. 4.
FIG. 4.

Optical mode frequencies of the coupled system measured by PIMM and VNA-FMR at easy axis bias field of . Acoustical mode frequencies are measured by VNA-FMR at easy axis bias field of .

Image of FIG. 5.
FIG. 5.

(Color online) Left: FFT of the PIMM signal of the trilayer after excitation by a pulse field of . Right: corresponding macrospin simulation. The color (online) indicates the mode intensities. The position of the optical and acoustical modes are similar as in Fig. 2 (right scale).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pulsed inductive measurement of ultrafast magnetization dynamics in interlayer exchange coupled NiFe∕Ru∕NiFe films