Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: Skyrmions I (joint session MA/TT)

TT 25.3: Vortrag

Dienstag, 17. März 2020, 10:15–10:30, POT 6

Intrinsic stability of magnetic anti-skyrmions in tetragonal inverse Heuslers — •Rana Saha1, Tianping Ma1, Abhay K. Srivastava1, Ankit Sharma1, Jagannath Jena1, Vivek Kumar2, Praveen Vir2, Claudia Felser2, and Stuart Parkin11Max Planck Institute of Microstructure Physics, Halle, Germany — 2Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

One of the major topics in spintronics today is the study of chiral non-collinear spin textures of various topologies. Recently, a novel chiral spin texture, magnetic anti-skyrmion that has distinct topological features from that of Bloch and Néel skyrmions, was discovered in tetragonal inverse Heusler, Mn1.4Pt0.9Pd0.1Sn [1]. Anti-skyrmions have boundaries (the in-plane magnetization region between magnetization pointing up and pointing down) that have a complex structure consisting of successive left hand Bloch, left hand Néel, right hand Bloch, and right hand Néel wall segments. This complex structure is a result of an anisotropic Dzyaloshinskii-Moriya exchange interaction that is set by the symmetry of the underlying lattice. Interestingly, magnetic anti-skyrmions are stable over a wide range of temperature, magnetic field and thickness of the lamella in which they are formed [2]. In this presentation, I will discuss our recent in-situ Lorentz and magnetic force microscopic studies of nucleation, stabilization and size manipulation of anti-skyrmions in tetragonal inverse Heuslers.
[1]Nayak et al., Nature 548, 561 (2017).
[2]Saha et al., Nat. Commun. 10, 5305 (2019).

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