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arXiv · 1602.00918

Magnetization Dynamics of Topological Defects and the Spin Solid in Kagome Artificial Spin Ice

V. S. Bhat·F. Heimbach·I. Stasinopoulos·D. Grundler
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Abstract

We report broadband spin-wave spectroscopy on kagome artificial spin ice (ASI) made of large arrays of interconnected Ni$_{80}$Fe$_{20}$ nanobars. Spectra taken in saturated and disordered states exhibit a series of resonances with characteristic magnetic field dependencies. Making use of micromagnetic simulations, we identify resonances that reflect the spin-solid-state and monopole-antimonopole pairs on Dirac strings. The latter resonances allow for the generation of highly-charged vertices in ASIs via microwave assisted switching. Our findings open further perspectives for fundamental studies on ASIs and their usage in reprogrammable magnonics.

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V. S. Bhat, F. Heimbach, I. Stasinopoulos, D. Grundler. 2016-02-02. Magnetization Dynamics of Topological Defects and the Spin Solid in Kagome Artificial Spin Ice. https://doi.org/10.1103/physrevb.93.140401

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