Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 51: Magnetic textures II
MA 51.1: Vortrag
Donnerstag, 15. März 2018, 15:00–15:15, EB 407
Chiral Magnetic Phase Diagrams and Cubic Anisotropy — •Lukas Heinen1, Alfonso Chacón Roldán2, Marco Halder2, Andreas Bauer2, Wolfgang Simeth2, Sebastian Mühlbauer2, Halmuth Berger3, Markus Garst4, Christian Pfleiderer2, and Achim Rosch1 — 1Universität zu Köln, Germany — 2Technische Universität München, Germany — 3École Polytechnique Federale de Lausanne, Switzerland — 4Universität Dresden, Germany
Chiral magnets exhibit rich magnetic phase diagrams, including several types of chiral magnetic order. The most prominent of these phases is the skyrmion lattice phase, consisting of a regular arrangement of whirl-like magnetic structures called skyrmions. Since skyrmions benefit from topologically-induced protection, and are easily manipulated, they are promising candidates for future applications in spintronics. Consequently, their range of thermodynamic stability is the topic of intensive research. However, the phase diagrams for unstrained bulk systems reported so far are remarkably similar across a multitude of different materials.
Motivated by recent experiments we study the influence of certain types of cubic anisotropy. The resulting phase diagram matches the experiment, is highly anisotropic and contains two new phases, one of which is a second skyrmion lattice phase.