Fig. 7: Broadband spin-wave spectroscopy spectra under the application of minor loop field protocol in Ammann tilings (ATs). | Communications Physics

Fig. 7: Broadband spin-wave spectroscopy spectra under the application of minor loop field protocol in Ammann tilings (ATs).

From: Spin dynamics, loop formation and cooperative reversal in artificial quasicrystals with tailored exchange coupling

Fig. 7

Scanning electron microscopy (SEM) images showing 1st generation Ammann tilings (a) ATA for which nanobars are fully connected, (b) ATB with partially connected nanobars and (c) ATC with disconnected nanobars. The black color scale bar represents 1 micrometer. Gray-scale spin-wave spectra for large arrays measured on 4th generation (d) ATA, (e) ATB, and (f) ATC, respectively. The minor loop magnetic field protocol implemented was (d) +90 mT → −34 mT → 90 mT, (e) +90 mT → −46 mT → 90 mT, and (f) +90 mT → −46 mT → 90 mT, respectively. The line spectra ΔS for (g) ATA, (h) ATB and (i) ATC at −30 mT (extracted at the white dashed lines in (d)–(f), respectively).

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