Magnetization dynamics of topological defects and the spin solid in a kagome artificial spin ice

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


Published in:
Physical Review B, 93, 14, 140401
Year:
2016
Publisher:
College Pk, Amer Physical Soc
ISSN:
2469-9969
Keywords:
Laboratories:




 Record created 2016-06-14, last modified 2018-09-13


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