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MA: Fachverband Magnetismus

MA 31: Poster II

MA 31.20: Poster

Mittwoch, 19. März 2025, 17:00–19:30, P1

Controlling Spin periodicity in a Helical Heisenberg Antiferromagnet — •Hyein Jung^1,2, Abeer Arora², Deeksha Gupta³, Franziska Walther⁴, Kristin Kliemt⁴, Victoria C. A. Taylor², Túlio de Castro², Hanqian Lu^1,2, Christian Schüßler-Langeheine³, Niko Pontius³, Urs Staub⁵, Cornelius Krellner⁴, Laurenz Rettig², Ralph Ernstorfer^1,2, and Yoav W. Windsor^1,2 — ¹Technische Universität Berlin, Berlin, Germany — ²Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — ³Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany — ⁴Goethe-Universität Frankfurt, Frankfurt, Germany — ⁵Paul Scherrer Institut, Villigen, Switzerland

Manipulating antiferromagnetic spin structures is a promising route to new spintronics functionality. This is particularly desirable on ultrafast time scales due to the growing demands for device speeds. Here we investigate the chiral antiferromagnet EuCo2P2 using resonant X-ray diffraction and manipulate the periodicity of its spins under three distinct conditions: (a) femtosecond laser pulse excitation, (b) applied magnetic fields, and (c) heating. These represent fundamentally distinct microscopic routes for manipulation, and their combination can provide an essential basis for achieving precise control of antiferromagnetic spin structures.

Keywords: Ultrafast Magnetization; Resonant X-ray Diffraction; Chiral Antiferromagnet; Incommensurate; Spin Structure