Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topological Defects

V. S. Bhat, S. Watanabe, K. Baumgaertl, A. Kleibert, M. A.W. Schoen, C. A.F. Vaz, D. Grundler

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We investigate spin dynamics of microstates in artificial spin ice (ASI) in Ni81Fe19 nanomagnets arranged in an interconnected kagome lattice using microfocus Brillouin light scattering, broadband ferromagnetic resonance, magnetic force microscopy, X-ray photoemission electron microscopy, and simulations. We experimentally reconfigure microstates in ASI using a 2D vector field protocol and apply microwave-assisted switching to intentionally trigger reversal. Our work is key for the creation of avalanches inside the kagome ASI and reprogrammable magnonics based on ASIs.

Original languageEnglish
Article number117208
JournalPhysical Review Letters
Volume125
Issue number11
DOIs
StatePublished - Sep 2020
Externally publishedYes

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