Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 26: Micromagnetism / Computational Magnetics

MA 26.2: Vortrag

Mittwoch, 28. März 2012, 11:00–11:15, H 0112

Chiral skyrmions as a new objects for magnetic storage technologies — •Nikolai Kiselev^1,2, Rudolf Schäfer¹, Alex Bogdanov¹, and Ulrich K. Rößler¹ — ¹IFW Dresden, Germany — ²PGI and IAS, Forschungszentrum Jülich, Germany

Chiral Skyrmions (CS) in magnetic materials are topologically non-trivial, intrinsically stable magnetization configurations with particle-like properties. CS can arise in bulk and nanolayers of magnetic metals with intrinsic [1] or surface/interface [2,3] induced Dzyaloshinskii-Moriya interaction. CS drastically differ from other axisymmetric patterns induced by external dipole-dipole forces (bubble domains in nanolayers [3] and magnetic vortices in magnetic nanodots). They are extremely stable in wide ranges of magnetic field, geometrical and materials parameters (layer thickness, uniaxial anisotropy, magnetization). Our theoretical findings allow us to conclude that CS hold promise for a new paradigm in data storage devices that can be based on stable multidimensional solitons in chiral soft magnetic media.

[1] A. N. Bogdanov, A. D. Yablonsky Sov. Phys. JETP 68, 101 (1989), [2] X. Z. Yu et al. Nature Mat. 465, 901 (2010), [3] S. Heinze et al. Nature Phys. 7, 713 (2011), [4] N.S. Kiselev et al. Phys. Rev. Lett. 107, 179701 (2011); J. Phys. D: Appl. Phys. 44, 392001 (2011).