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Nature forms many patterns, and it's fascinating to observe how individual components interact to create such complexity. In magnets, beautiful patterns can emerge even without inversion symmetry. The twisting magnetic patterns in chiral helimagnetic materials, whether topologically trivial or not, can provide collective magnetic excitations across a wide frequency range from a few GHz to several THz. These unique properties make helimagnets promising candidates for applications in spintronics and unconventional computing. Realizing these concepts, however, requires ultraclean magnetic systems with minimal losses and a deep understanding of their magnetization dynamics. In this talk, I will introduce the fundamental aspects of chiral helimagnets and explore their magnetization dynamics, particularly in single crystals. The focus will be on the chiral helimagnetic insulator Cu₂OSeO₃, with experiments done primarily through broadband magnetic resonance spectroscopy. Our findings reveal the potential to modify magnetic textures via interface effects.

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Aisha Aqeel, University of Augsburg
Seminar Room of the Institute of Physics II
Contact: Erwann / Matteo