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journal article·2018-05-01Open access

Coupled macrospins: Mode dynamics in symmetric and asymmetric vertices

Wonbae Bang, Matthias B. Jungfleisch, Federico Montoncello, Barry W. Farmer, Pavel N. Lapa, Axel Hoffmann, Loris Giovannini, Lance E. De Long, John B. Ketterson

AIP Advances· Volume 8· Issue 5
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Source abstract

Abstract

We report the microwave response of symmetric and asymmetric threefold clusters with nearly contacting segments that can serve as the node in a Kagome artificial spin ice lattice. The structures are patterned on a coplanar waveguide and consist of elongated and nearly-contacting ellipses with uniform thickness. Branches of the ferromagnetic resonance spectra display mode softening that correlates well with the calculations, whereas agreement between the measured and simulated static magnetization is more qualitative.
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Research context

OpenAlex topics: Advanced Condensed Matter Physics · Physics of Superconductivity and Magnetism · Theoretical and Computational Physics

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Affiliations

Department of Physics and Astronomy, Northwestern University 1 , Evanston, IL 60208, USA

Materials Science Division, Argonne National Laboratory 2 , Argonne, IL 60439, USA

Dipartimento di Fisica e Scienze della Terra, Università di Ferrara 3 , Ferrara I-44122, Italy

Department of Physics and Astronomy, University of Kentucky 4 , Lexington, KY 40506, USA

Department of Electrical and Computer Engineering, Northwestern University 5 , Evanston, IL 60208, USA

Funding

National Science Foundation · DOE | Office of Science · DOE | SC | Basic Energy Sciences

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