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Information dimension analysis of chaotic forward volume spin waves in a yttrium–iron–garnet thin film
, Stancil D.D.
Published in AIP Publishing
Volume: 87
Issue: 9
Pages: 5091 - 5093
Forward volume spin waves were excited in a yttrium–iron–garnet film using a microstrip delay line. Low frequency modulations in output power were captured on a digital oscilloscope for various combinations of microwave input frequency and power. Using the decrease in mutual information as a criterion, an embedding delay time was chosen for each time series. The method of false nearest neighbors was then used to calculate a minimal embedding dimension, D. Despite large changes in input frequency [formula omitted] and power [formula omitted] [formula omitted] for each time series, indicating a low dimensional system. Finally, the information dimension, d, was estimated by computing the distance from a collection of reference points to their nearest neighbors. The distribution for d was found to be bimodal. When correlated with the input microwave power and frequency, it was found that values of [formula omitted] occurred close to the auto-oscillation threshold in the vicinity of an even dipole gap. [formula omitted] was observed at higher power levels or at frequencies close to an odd dipole gap. © 2000, American Institute of Physics. All rights reserved.
About the journal
JournalData powered by TypesetJournal of Applied Physics
PublisherData powered by TypesetAIP Publishing
Open AccessNo