Chiral and Topological Nature of Magnetic Skyrmions - Shilei Zhang

Chiral and Topological Nature of Magnetic Skyrmions

(Autor)

Buch | Softcover
XXI, 117 Seiten
2019 | 1. Softcover reprint of the original 1st ed. 2018
Springer International Publishing (Verlag)
978-3-030-07472-2 (ISBN)
117,69 inkl. MwSt

This book focuses on the characterisation of the chiral and topological nature of magnetic skyrmions in noncentrosymmetric helimagnets. In these materials, the skyrmion lattice phase appears as a long-range-ordered, close-packed grid of nearly millimetre-level correlation length, while the size of a single skyrmion is 3-100 nm. This is a very challenging range of length scales (spanning 5 orders of magnitude from tens of nm to mm) for magnetic characterisation techniques, and, to date, extensive information on this fascinating, magnetically ordered state has remained elusive. In response, this work develops novel resonant elastic x-ray scattering (REXS) techniques, which allow the magnetic structure, including the long-range order and domain formation, as well as microscopic skyrmion parameters, to be measured across the full range of length scales. Most importantly, using circular dichroism in REXS, the internal structure of a given skyrmion, the topological winding number, and theskyrmion helicity angle can all be unambiguously determined. These new techniques are applicable to many materials systems, and allow us to retrieve information on modulated spin structures, multiferroic order, spin-density-waves, and other forms of topological magnetic order.


Shilei Zhang received his B.Eng. and M.Eng. degrees in Materials Physics from the University of Science and Technology Beijing. As a visiting scientist in Oxford's Clarendon Laboratory, he worked on magnetic devices, before joining in 2012 as a D.Phil. student in physics under the supervision of Prof. Thorsten Hesjedal.

The Story so Far.- Measurement of the Magnetic Long-range Order.- Measurement of the Skyrmion Lattice Domains.- Measurement of the Topological Winding Number.- Measurement of the Skyrmion Helicity Angle.- Dichroism Extinction Rule.

Erscheinungsdatum
Reihe/Serie Springer Theses
Zusatzinfo XXI, 117 p. 46 illus. in color.
Verlagsort Cham
Sprache englisch
Maße 155 x 235 mm
Gewicht 226 g
Themenwelt Naturwissenschaften Chemie Analytische Chemie
Naturwissenschaften Physik / Astronomie Atom- / Kern- / Molekularphysik
Naturwissenschaften Physik / Astronomie Elektrodynamik
Schlagworte Magnetic Skyrmion • Resonant elastic X-ray scattering • Skyrmions • Spintronics • Topological Magnetic Order • Topological Materials • x-ray magnetic circular dichroism • X-ray spectroscopy
ISBN-10 3-030-07472-2 / 3030074722
ISBN-13 978-3-030-07472-2 / 9783030074722
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