Helimagnon Resonances in an Intrinsic Chiral Magnonic Crystal

Mathias Weiler, Aisha Aqeel, Maxim Mostovoy, Andrey Leonov, Stephan Geprägs, Rudolf Gross, Hans Huebl, Thomas T. M. Palstra, and Sebastian T. B. Goennenwein
Phys. Rev. Lett. 119, 237204 – Published 6 December 2017
PDFHTMLExport Citation

Abstract

We experimentally study magnetic resonances in the helical and conical magnetic phases of the chiral magnetic insulator Cu2OSeO3 at the temperature T=5K. Using a broadband microwave spectroscopy technique based on vector network analysis, we identify three distinct sets of helimagnon resonances in the frequency range 2GHzf20GHz with low magnetic damping α0.003. The extracted resonance frequencies are in accordance with calculations of the helimagnon band structure found in an intrinsic chiral magnonic crystal. The periodic modulation of the equilibrium spin direction that leads to the formation of the magnonic crystal is a direct consequence of the chiral magnetic ordering caused by the Dzyaloshinskii-Moriya interaction. The mode coupling in the magnonic crystal allows excitation of helimagnons with wave vectors that are multiples of the spiral wave vector.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 8 May 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.237204

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Mathias Weiler1,2,*, Aisha Aqeel3,†, Maxim Mostovoy3, Andrey Leonov3,4, Stephan Geprägs1, Rudolf Gross1,2,5, Hans Huebl1,2,5, Thomas T. M. Palstra3,‡, and Sebastian T. B. Goennenwein1,2,5,6,7

  • 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
  • 2Physik-Department, Technische Universität München, 85748 Garching, Germany
  • 3Zernike Institute for Advanced Materials, University of Groningen, 9700 AB Groningen, The Netherlands
  • 4Center for Chiral Science, Hiroshima University, Hiroshima 739-8526, Japan
  • 5Nanosystems Initiative Munich, 80799 Munich, Germany
  • 6Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
  • 7Center for Transport and Devices of Emergent Materials, Technische Universität Dresden, 01062 Dresden, Germany

  • *mathias.weiler@wmi.badw.de
  • Present address: University of Regensburg, Regensburg, Germany.
  • Present address: The University of Twente, Enschede, The Netherlands.

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 119, Iss. 23 — 8 December 2017

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×