PGI Kolloquium: Prof. Dr. István Kézsmárki, University of Augsburg, Augsburg, Germany
Please note: You will receive the link to the online talk in the e-mail invitation, usually sent out a few days before the lecture takes place. It is also available on request from the contact person below.
Measuring and tailoring anisotropy in skyrmion- and antiskyrmion-host materials
As known for long, in centrosymmetric crystals magnetic anisotropy plays a key role in the formation of magnetic bubbles, including topologically trivial and non-trivial ones. In contrast, in non-centrosymmetric magnets, where the Dzyaloshinskii-Moriya interaction is a key player in stabilizing magnetic skyrmions, systematic studies on the effect of anisotropy have been virtually non-existing. However, recent theoretical predictions and experimental observations show that the quantitative description of the (anti)skyrmion stability range, the formation of distinct high- and low-temperature skyrmion lattice phases and other emergent exotic mesoscale spin patterns all require the treatment of magnetic anisotropy on equal footing with the Dzyaloshinskii-Moriya interaction. Here we provide a short overview, from an experimental point of view, on the vital role of magnetic anisotropy in various skyrmion and antiskyrmion host materials, via the spectroscopic determination of relevant anisotropy terms in non-centrosymmetric cubic (O, T) and axial (Cnv, S4) magnets [1-6].
[1] I. Kézsmárki et al., Nat. Mater. 14, 1116 (2015)
[2] D. Ehlers et al., J. Phys.: Condens. Matter 29, 065803 (2017)
[3] B. Gross et al., Phys. Rev. B 102, 104407 (2020)
[4] M. Preissinger et al., npj Quantum Mater. 6, 65 (2021)
[5] A. Butykai et al., npj Quantum Mater. 7, 26 (2022)
[5] K. Karube et al., Adv.Mater. 34, 2108770 (2022)
Contact
Dr. Andras Kovacs
Telefon: +49 2461/61-9276
Email: a.kovacs@fz-juelich.de