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Simple method for optimization of classical electron magnetic circular dichroism measurements : The role of structure factor and extinction distances

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2018

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Schneider, Sebastian
Negi, Devendra
Stolt, Matthew J.
Jin, Song
Spiegelberg, Jakob
Pohl, Darius
Rellinghaus, Bernd
Nielsch, Kornelius
Rusz, Ján

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https://doi.org/10.1103/PhysRevMaterials.2.113801
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Physical Review Materials. American Physical Society (APS). 2018, 2(11), 113801. eISSN 2475-9953. Available under: doi: 10.1103/PhysRevMaterials.2.113801

Zusammenfassung

Electron magnetic circular dichroism (EMCD), the electron wave analog of x-ray magnetic circular dichroism (XMCD), allows for the element specific measurement of the spin and orbital magnetic moments with up to nanometer resolution. However, due to dynamical diffraction effects, the signal-to-noise ratios of EMCD spectra are often very low. We describe a simple set of rules, how to set up a geometry for a classical EMCD experiment on an arbitrary crystal structure to get a maximum dichroic signal. The procedure is based on an evaluation of the structure factor and extinction distances. Proof-of-concept simulations and experiments on a FeGe crystal present a successful test of these guidelines.

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ISO 690SCHNEIDER, Sebastian, Devendra NEGI, Matthew J. STOLT, Song JIN, Jakob SPIEGELBERG, Darius POHL, Bernd RELLINGHAUS, Sebastian T. B. GOENNENWEIN, Kornelius NIELSCH, Ján RUSZ, 2018. Simple method for optimization of classical electron magnetic circular dichroism measurements : The role of structure factor and extinction distances. In: Physical Review Materials. American Physical Society (APS). 2018, 2(11), 113801. eISSN 2475-9953. Available under: doi: 10.1103/PhysRevMaterials.2.113801
BibTex
@article{Schneider2018Simpl-51828,
  year={2018},
  doi={10.1103/PhysRevMaterials.2.113801},
  title={Simple method for optimization of classical electron magnetic circular dichroism measurements : The role of structure factor and extinction distances},
  number={11},
  volume={2},
  journal={Physical Review Materials},
  author={Schneider, Sebastian and Negi, Devendra and Stolt, Matthew J. and Jin, Song and Spiegelberg, Jakob and Pohl, Darius and Rellinghaus, Bernd and Goennenwein, Sebastian T. B. and Nielsch, Kornelius and Rusz, Ján},
  note={Article Number: 113801}
}
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