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

doi:10.1063/1.5007281

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

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

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.

Original language	English (US)
Article number	056020
Journal	AIP Advances
Volume	8
Issue number	5
DOIs	https://doi.org/10.1063/1.5007281
State	Published - May 1 2018

Funding

Work at Northwestern was supported by the NSF under grant DMR 1507058. Work at the University of Kentucky was supported by the NSF under grant DMR 1506979. Work at Argonne was supported by the U.S. Department of Energy, Office of Science, Materials Science and Engineering Division. Use was made of the Center for Nanoscale Materials, an Office of Science user facility, which is supported by DOE, Office of Science, Basic Energy Science under Contract No. DE-AC02-06CH11357.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.5007281

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AU - Bang, Wonbae

AU - Jungfleisch, Matthias B.

AU - Montoncello, Federico

AU - Farmer, Barry W.

AU - Lapa, Pavel N.

AU - Hoffmann, Axel

AU - Giovannini, Loris

AU - De Long, Lance E.

AU - Ketterson, John B.

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AB - 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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Coupled macrospins: Mode dynamics in symmetric and asymmetric vertices

Abstract

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