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MA: Fachverband Magnetismus
MA 12: Skyrmions I
MA 12.5: Talk
Monday, March 18, 2024, 16:00–16:15, EB 301
Meron-antimeron lattice in Gd2PdSi3 and its topological Hall effect — •Leonie Spitz1,2, Sebastian Esser3, Fehmi Sami Yasin2, Kamil Kolincio2, Takashi Kurumaji2, Sonia Francoual4, Pablo Bereciartua4, Akiko Kikkawa2, Yasujiro Taguchi2, Xiuzhen Yu2, Taka-hisa Arima2,5, Yoshinori Tokura2,3,6, and Max Hirschberger2,3 — 1Paul-Scherrer-Institut, Switzerland — 2RIKEN Center for Emergent Matter Science, Japan — 3Dept. of Applied Phys., The University of Tokyo, Japan — 4PETRA-III Synchrotron, DESY, Germany — 5Dept. of Adv. Materials Science, The University of Tokyo, Japan — 6Tokyo College, The University of Tokyo, Japan
Merons and antimerons are triple-q spin textures with winding number n = ± 1/2. Apart from the winding number, meron/antimeron lattices differ from a skyrmion lattice in the phase between their constituent helical spin-density waves [1]. A skyrmion lattice accompanied by a large topological Hall effect was found in the centrosymmetric frustrated triangular lattice magnet Gd2PdSi3 in a magnetic field [2]. We focused on the zero-field ground state of Gd2PdSi3 and identified its triple-q magnetic structure as a meron-antimeron lattice. We studied the characteristics of the transition between the meron-antimeron phase and the skyrmion phase in Gd2PdSi3 to elucidate which degree of freedom is driving the transition in this case [3].
[1] S. Hayami et al., Nat. Commun. 12, 6927 (2021) [2] T. Kurumaji et al., Science 365, 914-918 (2019) [3] L. Spitz et al., manuscript in preparation
Keywords: Meron; Antimeron; Skyrmion