Spectroscopy of the parametric magnons excited by 4-wave process

Details Spectroscopy of the parametric magnons excited by 4-wave process Spectroscopy of the parametric magnons excited by 4-wave process

2007-01-12

arxiv.org/abs/cond-mat/0701287v1

Physical Review B 75 (2007) 140405

Physics

Condensed Matter

Materials Science

4 pages

Scientific paper

Using a Magnetic Resonace Force Microscope, we have performed ferromagnetic resonance (FMR) spectroscopy on parametric magnons created by 4-wave process. This is achieved by measuring the differential response to a small source modulation superimposed to a constant excitation power that drives the dynamics in the saturation regime of the transverse component. By sweeping the applied field, we observe abrupt readjustement of the total number of magnons each time the excitation coincides with a parametric mode. This gives rise to ultra-narrow peaks whose linewith is lower than $5~10^{-6}$ of the applied field.

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