• Rapid Communication

Spin-Cherenkov effect and magnonic Mach cones

Ming Yan, Attila Kákay, Christian Andreas, and Riccardo Hertel
Phys. Rev. B 88, 220412(R) – Published 30 December 2013
PDFHTMLExport Citation

Abstract

We report on the Cherenkov-type excitation of spin waves (SWs) in ferromagnets. Our micromagnetic simulations show that a localized magnetic field pulse moving sufficiently fast along the surface of a ferromagnet generates a SW boom, with a Mach-type cone of propagating wave fronts. The SWs are formed when the velocity of the source exceeds the propagation speed of SWs. Unlike the single cone of the usual Cherenkov effect, we find that the magnetic Mach cone consists of two wave fronts with different wave numbers. In patterned thin strips, this magnetic analog of the Cherenkov effect should enable the excitation of SWs with well-defined and velocity-dependent frequency. It thereby provides a promising route towards tunable SW generation, with important potential for applications in magnonic devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 5 November 2012
  • Revised 27 September 2013

DOI:https://doi.org/10.1103/PhysRevB.88.220412

©2013 American Physical Society

Authors & Affiliations

Ming Yan1,*, Attila Kákay2, Christian Andreas2,3, and Riccardo Hertel3

  • 1Department of Physics, Shanghai University, Shanghai 200444, China
  • 2Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich GmbH, D-52428 Jülich, Germany
  • 3Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, Strasbourg, France

  • *Corresponding author: myan@shu.edu.cn

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 88, Iss. 22 — 1 December 2013

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 B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×