Abstract
Recent small angle neutron scattering suggests that the spin structure in the phase of MnSi is a so-called triple- state, i.e., a superposition of three helices under 120 degrees. Model calculations indicate that this structure in fact is a lattice of so-called Skyrmions, i.e., a lattice of topologically stable knots in the spin structure. We report a distinct additional contribution to the Hall effect in the temperature and magnetic field range of the proposed Skyrmion lattice, where such a contribution is neither seen nor expected for a normal helical state. Our Hall effect measurements constitute a direct observation of a topologically quantized Berry phase that identifies the spin structure seen in neutron scattering as the proposed Skyrmion lattice.
- Received 27 November 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.186602
©2009 American Physical Society
Erratum
Erratum: Topological Hall Effect in the Phase of MnSi [Phys. Rev. Lett. 102, 186602 (2009)]
A. Neubauer, C. Pfleiderer, B. Binz, A. Rosch, R. Ritz, P. G. Niklowitz, and P. Böni
Phys. Rev. Lett. 110, 209902 (2013)
Viewpoint
A new twist in a ferromagnet
Published 4 May 2009
Transport measurements show evidence of a topologically nontrivial structure—a lattice of skyrmions—in intermetallic .
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