Regensburg 2022 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 23: Skyrmions 2 (joint session MA/KFM)
KFM 23.2: Vortrag
Donnerstag, 8. September 2022, 09:45–10:00, H37
Doping control of magnetic anisotropy for stable antiskyrmion formation in schreibersite (Fe,Ni)3P with S4 symmetry — Kosuke Karube1, Licong Peng1, •Jan Masell1,2, Mamoun Hemmida3, Hans-Albrecht Krug von Nidda3, István Kézsmárki3, Xiuzhen Yu1, Yoshinori Tokura1,4, and Yasujiro Taguchi1 — 1RIKEN CEMS, Wako, Japan — 2Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 3University of Augsburg, Augsburg, Germany — 4University of Tokyo, Tokyo, Japan
Recently, growing attention has also been paid to antiskyrmions emerging in non-centrosymmetric magnets with D2d or S4 symmetry. [1] In these magnets, complex interplay among anisotropic Dzyaloshinskii-Moriya interaction, uniaxial magnetic anisotropy, and magnetic dipolar interactions generates a variety of magnetic structures. We control the uniaxial magnetic anisotropy of schreibersite (Fe,Ni)3P with S4 symmetry by doping and investigate its impact on the stability of antiskyrmions. With magnetometry, supported by ferromagnetic resonance spectroscopy, Lorentz transmission electron microscopy, and micromagnetic simulations, we quantitatively analyze the stability of antiskyrmion as functions of uniaxial anisotropy and demagnetization energy, and demonstrate that subtle balance between them is necessary to stabilize antiskyrmions.
[1] K. Karube, L. C. Peng, J. Masell, X. Z. Yu, F. Kagawa, Y. Tokura, and Y. Taguchi, Nat. Mater. 20, 335-340 (2021) [2] The authors, Adv. Mater. 34 (11), 2108770 (2022)