Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Magnetic Textures: Statics and experimental imaging
MA 3.7: Vortrag
Montag, 20. März 2017, 11:15–11:30, HSZ 101
Cycloidal and Néel-type skyrmion lattice phases in polar lacunar spinels — •Sándor Bordács1, Jonathan S White2, Ádám Butykai1, Charles D Dewhurst3, Robert Cubitt3, Vladimir Tsurkan4, Alois Loidl4, and István Kézsmárki1 — 1Department of Physics, Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group, Budapest, Hungary — 2Laboratory for Neutron Scattering and Imaging, PSI, Villigen, Switzerland — 3Institut Laue-Langevin, Grenoble, France — 4Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, Augsburg, Germany
Magnetic skyrmions arising from the competition between symmetric and antisymmetric exchange interactions in chiral magnets have attracted much attention due to their potential application in ultra-dense data storage. Recently, we have shown that multiferroic materials - polar magnets - can also host skyrmions. These Néel-type skyrmions have different helicity and they are decorated with non-trivial polarization patterns as well, which may open new ways to manipulate magnetic skyrmions via the electric fields.
In this talk we will report a systematic small angle neutron scattering (SANS) study of polar lacunar spinels, where we observed several phases with modulated magnetic order such as cycloidal and Néel-type skyrmion lattice phases. SANS allowed us to characterize the various phases realized in compounds with easy-axis, easy-plane type magnetic anisotropy as well as lacunar spinels with crystal structures streched and compressed along the polarization.