Seminaria

Seminarium wydziałowe

Dnia 2019-06-11 o godzinie 14:15 w sali 2011 Wydziału Fizyki UwB odbędzie się wykład, na którym dr Vinayak Bhat z International Centre for Interfacing Magnetism and Superconductivity with Topological Matter – MagTop (ON-6), Institute of Physics, Polish Academy of Sciences, wygłosi wykład pt:

"Mastering Frustration at the Nanoscale: A Study of Periodic and Quasicrystalline Nanomagnet Lattice"

Serdecznie zapraszamy

Andrzej Maziewski

Frustration—a phenomenon where competing interactions not all satisfied at the same time—has found its consideration in different fields of science [1,2]. Recent advances in nanofabrication techniques allow researchers to gain novel aspects regarding frustration via various quasistatic imaging and dynamic techniques. Here I present our magnetodynamics results on geometrically frustrated artificial spin ices (made of Permalloy nanomagnets on kagome lattices) that were studied using broadband spin-wave spectroscopy, Brillouin light spectroscopy, and micromagnetic simulations [3,4]. In the second part of my talk, I will address the topic of effects of aperiodicity on fundamental physical phenomena. Here, I will present our X-ray photoemission electron microscopy, broadband spin-wave spectroscopy, and simulation studies of Permalloy nanobars on various 2D frustrated quasicrystal lattices [5,6]. References: [1] A. Farhan et al., Phys. Rev. B 89, 214405 (2014). [2] M. Krawczyk and D. Grundler, J. Phys.: Condens. Matter 26, 123202 (2014). [3] V. S. Bhat et al., Phys. Rev. B 93, 140401 (R) (2016). [4] V. S. Bhat et al., Phys. Rev. B 96, 014426 (2017) [5] V. S. Bhat et al., Phys. Rev. Letts. 111, 077201 (2013). [6] V. S. Bhat and D. Grundler, arXiv:1804.10630 (2018).