Theory of magnon diffuse scattering in scanning transmission electron microscopy

K Lyon and A Bergman and P Zeiger and D Kepaptsoglou and QM Ramasse and JC Idrobo and J Rusz, PHYSICAL REVIEW B, 104, 214418 (2021).

DOI: 10.1103/PhysRevB.104.214418

We present a theory and a simulation of diffuse scattering due to the excitation of magnons in scanning transmission electron microscopy. The calculations indicate that magnons can present atomic contrast when detected by electron energy-loss spectroscopy using atomic-size electron beams. The results presented here indicate that the intensity of the magnon diffuse scattering in bcc iron at 300 K is 4 orders of magnitude weaker than the intensity of thermal diffuse scattering arising from atomic vibrations.

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