Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 68: Poster 5

MA 68.9: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG4

Resonant Elastic X-ray Scattering (REXS) from the helical phase in Cu₂OSeO₃ at VEKMAG — •Simon Pöllath¹, Chen Luo¹, Martin Schön¹, Florin Radu², Hanjo Ryll², and Christian Back¹ — ¹Universität Regensburg Institut für Experimentelle und Angewandte Physik, Regensburg, Deutschland — ²Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Deutschland

We report successful Resonant Elastic X-ray Scattering (REXS) experiments at the BESSY II PM2 VEKMAG beamline. We investigate a single crystalline Cu₂OSeO₃ sample grown by the chemical vapor transport method. The multiferroic insulator Cu₂OSeO₃ hosts a variety of magnetically modulated states at weak externally applied fields and below its critical Temperature. In the helical phase of the chiral magnet, the structural (001) Bragg peak shows a multiple splitting at the Cu L3 edge energy, caused by the modulated magnetic texture. Reciprocal space maps of the helical phase are obtained using a pin-hole diode. Additionally, the thermodynamic phase diagram is accessible from magnetization loops of the Bragg peak intensity. The vector magnet enables precise control of the modulation directions for future studies of conical and skyrmionic phases.