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Lecture Andrey A. Leonov


24 February 2012 FWN-Building 5113.0201, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Andrey A. Leonov
Affiliation: IFW Dresden, Germany
Title: Phenomenological theory of Skyrmion states in chiral magnets
Date: Fri Feb 24, 2012
Start: 09.30
Location: FWN-Building 5113.0201
Host: Maxim Mostovoy
Telephone: +31 50 363 3419


Chiral Skyrmions – tubular two-dimensional static topological solitons with a fixed sense of magnetization rotation – were predicted to exist in a large group of non-centrosymmetric helimagnets more than twenty years ago [1]. Recently these extraordinary magnetic states (isolated and bound into hexagonal lattices) have been microscopically observed in thin layers of cubic helimagnets, (Fe,Co)Si and FeGe, in a broad range of temperatures and magnetic fields [2]. In this talk I review earlier theoretical findings [1] and recent results [3] on main properties of chiral Skyrmions, elucidate their physical nature, and analyse experimental results on temperature- and magnetic-field-driven evolution of Skyrmions in chiral helimagnets [2].


 [1] A N. Bogdanov, A.D. Yablonsky, Sov. Phys. JETP 68, 101 (1989).

[2] X.Z. Yu et al. Nature 465, 901 (2010), Nature Mater. 10, 106 (2011).

[3] U.K. Roessler, A.A. Leonov, A.N. Bogdanov, J. of Phys.: Conf. Ser. 303, 012105 (2011).

Last modified:22 October 2012 2.30 p.m.