Jingyuan Zhou
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
Magnonic crystals (MCs), a metamaterial with artificially introduced periodicity, offer many possibilities to control spin wave propagation within them [1]. Spin waves propagating in opposite directions can have different amplitudes or frequencies, which is known as spin wave nonreciprocity [2]. The aim of this work is to enhance spin wave nonreciprocity in bi-component MCs based on antiferromagnetically coupled ferromagnetic layers [2]. Spin wave nonreciprocity will be measured using a time-resolved magneto-optical Kerr microscope. With first measurements of time-resolved magnetization precession in antiferromagnetically coupled films we observe a decrease of precession frequency, compared with normal ferromagnetic films.
References:
[1] M. Krawczyk et al., J. Phys. Condens. Matter 26. 12, 123202 (2014)
[2] K. Di et al., Sci. Rep. 5, 10153 (2015)
Jingyuan Zhou
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
Susmita Saha
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
Zhaochu Luo
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
Ms
Eugenie Kirk
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
Valerio Scagnoli
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
Laura Heyderman
(Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland and Paul Scherrer Institut, 5232 Villigen, Switzerland)
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