Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topological Defects
Vinayak Shantaram Bhat, Sho Watanabe, Korbinian Baumgaertl, Armin Kleibert, Martin Schoen, C. A. F. Vaz, Dirk Grundler
Abstract
We investigate spin dynamics of microstates in artificial spin ice (ASI) in Ni_{81}Fe_{19} 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.
Topics & Concepts
Spin iceNanomagnetBrillouin zoneCondensed matter physicsMagnonMicrowavePhysicsFerromagnetismSpin waveMagnetic fieldMaterials scienceQuantum mechanicsMagnetic monopoleMagnetizationAdvanced Condensed Matter PhysicsTheoretical and Computational PhysicsMultiferroics and related materials