Chirality in Magnetic Multilayers Probed by the Symmetry and the Amplitude of Dichroism in X-Ray Resonant Magnetic Scattering

Abstract : Chirality in condensed matter has recently become a topic of the utmost importance because of its significant role in the understanding and mastering of a large variety of new fundamental physical mechanisms. Versatile experimental approaches, capable to reveal easily the exact winding of order parameters, are therefore essential. Here we report x-ray resonant magnetic scattering as a straightforward tool to reveal directly the properties of chiral magnetic systems. We show that it can straightforwardly and unambiguously determine the main characteristics of chiral magnetic distributions: i.e., its chiral nature, the quantitative winding sense (clockwise or counterclockwise), and its type, i.e., Néel [cycloidal] or Bloch [helical]. This method is model independent, does not require a priori knowledge of the magnetic parameters, and can be applied to any system with magnetic domains ranging from a few nanometers (wavelength limited) to several microns. By using prototypical multilayers with tailored magnetic chiralities driven by spin-orbit-related effects at CojPt interfaces, we illustrate the strength of this method.
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Physical Review Letters, American Physical Society, 2018, 120 (3), 〈10.1103/PhysRevLett.120.037202〉
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Soumis le : mardi 13 février 2018 - 15:07:50
Dernière modification le : jeudi 15 mars 2018 - 15:06:35

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Jean-Yves Chauleau, William Legrand, Nicolas Reyren, Davide Maccariello, Sophie Collin, et al.. Chirality in Magnetic Multilayers Probed by the Symmetry and the Amplitude of Dichroism in X-Ray Resonant Magnetic Scattering. Physical Review Letters, American Physical Society, 2018, 120 (3), 〈10.1103/PhysRevLett.120.037202〉. 〈hal-01704613〉

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