A novel Skyrmion lattice topology in MnGe?
Magnetic Skyrmions are well-established to exist in a small pocket of the magnetic phase diagrams of a range of chiral magnets, such as MnSi and FeGe. The Skyrmions typically form a 2D triangular lattice that can be described in terms of triple-q coupling of long wavelength single-q helically-modulated structures, and the resulting non-coplanar spin texture gives rise to novel emergent fields. MnGe is isostructural with the other Skyrmion hosts, yet displays a very different magnetic phase diagram with a remarkably large Skyrmion lattice (SkL) phase. Further, strong evidence indicates that the SkL topology in MnGe is not the conventional 2D triangular one, but instead is of novel 3D simple-cubic type. Until now however, experimental confirmation of this 3D cubic SkL has remained out of reach since only MnGe powder samples could be studied. Here we request 6 days on D33 to carry out a SANS study of newly available, and high quality single-crystalline MnGe thin films. The main goal is to confirm the existence of this new type of 3D SkL structure in MnGe, the topology of which is expected to support a new and novel lattice of emergent monopole and anti-monopole fields.
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WHITE Jonathan; DEWHURST Charles; KANAZAWA Naoya and Henrik M. Ronnow. (2015). A novel Skyrmion lattice topology in MnGe?. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-54-185
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