Tunable geometrical frustration in magnonic vortex crystals
SCIENTIFIC REPORTS(2018)
Abstract
A novel approach to investigate geometrical frustration is introduced using two-dimensional magnonic vortex crystals. The frustration of the crystal can be manipulated and turned on and off dynamically on the timescale of milliseconds. The vortices are studied using scanning transmission x-ray microscopy and ferromagnetic resonance spectroscopy. They are arranged analogous to the nanomagnets in artificial spin-ice systems. The polarization state of the vortices is tuned in a way that geometrical frustration arises. We demonstrate that frustrated polarization states and non-frustrated states can be tuned to the crystal by changing the frequency of the state formation process.
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Key words
Ferromagnetism,Magnetic properties and materials,Science,Humanities and Social Sciences,multidisciplinary
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