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Title: Broadband and total autocollimation of spin waves using planar magnonic crystals

We present a systematic study of spin wave autocollimation in planar magnonic crystals comprising of antidot arrays in nanoscale permalloy (Py: Ni{sub 80}Fe{sub 20}) thin films. It is shown that a careful design of such crystals can allow for the autocollimation of the entire spin wave spectrum without any significant evanescence or any drop in the group velocity. These developments allow us access to spin wave beams which do not disperse or converge outside a waveguide. Collimated spin wave beams would be essential in applications such as dense signal routing and multiplexing in higher dimensional magnonic systems.
Authors:
;  [1]
  1. Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)
Publication Date:
OSTI Identifier:
22402838
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYSTALS; ENERGY SPECTRA; MAGNONS; NANOSTRUCTURES; NICKEL BASE ALLOYS; PERMALLOY; SPIN WAVES; THIN FILMS; VELOCITY; WAVEGUIDES