Magnetic interfaces as sources of coherent spin waves

V. D. Poimanov, A. N. Kuchko, and V. V. Kruglyak
Phys. Rev. B 98, 104418 – Published 14 September 2018

Abstract

We have developed a simple but general analytical theory that elucidates the mechanism of spin-wave generation from interfaces between ferromagnetic media pumped by a uniform microwave magnetic field. Our calculations show that, provided there is a finite coupling between the two media, the amplitude of the emitted spin waves depends linearly on the difference between their magnetic susceptibilities. The theory is successfully applied to interpret qualitatively three recent experimental studies in which such a spin-wave emission was observed. Furthermore, we describe how our approach can be extended to several more complicated spin-wave excitation schemes employing electric, elastic, and optical stimuli.

  • Figure
  • Received 24 July 2018

DOI:https://doi.org/10.1103/PhysRevB.98.104418

©2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

V. D. Poimanov1, A. N. Kuchko2,3, and V. V. Kruglyak4,*

  • 1Donetsk National University, 24 Universitetskaya Street, Donetsk 83001, Ukraine
  • 2Institute of Magnetism of NAS of Ukraine, 36b Vernadskogo Avenue, Kiev 03142, Ukraine
  • 3Igor Sikorsky Kyiv Polytechnic Institute, 37 Prospect Peremohy, Kiev, 03056, Ukraine
  • 4University of Exeter, Stocker road, Exeter EX4 4QL, United Kingdom

  • *Corresponding author: v.v.kruglyak@exeter.ac.uk

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Issue

Vol. 98, Iss. 10 — 1 September 2018

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