Current-induced modulation of backward spin-waves in metallic microstructures

Nana Sato, Seo Won Lee, Kyung Jin Lee, Koji Sekiguchi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We performed a propagating spin-wave spectroscopy for backward spin-waves in ferromagnetic metallic microstructures in the presence of electric-current. Even with the smaller current injection of 5 × 1010 A m-2 into ferromagnetic microwires, the backward spinwaves exhibit a gigantic 200 MHz frequency shift and a 15% amplitude change, showing 60 times larger modulation compared to previous reports. Systematic experiments by measuring dependences on a film thickness of mirowire, on the wave-vector of spin-wave, and on the magnitude of bias field, we revealed that for the backward spin-waves a distribution of internal magnetic field generated by electric-current efficiently modulates the frequency and amplitude of spin-waves. The gigantic frequency and amplitude changes were reproduced by a micromagnetics simulation, predicting that the current-injection of 5 × 1011 A m-2 allows 3 GHz frequency shift. The effective coupling between electric-current and backward spinwaves has a potential to build up a logic control method which encodes signals into the phase and amplitude of spin-waves. The metallic magnonics cooperating with electronics could suggest highly integrated magnonic circuits both in Boolean and non-Boolean principles.

Original languageEnglish
Article number094004
JournalJournal of Physics D: Applied Physics
Volume50
Issue number9
DOIs
Publication statusPublished - 2017 Feb 6

Fingerprint

Spin waves
Induced currents
magnons
Modulation
modulation
microstructure
Microstructure
Electric currents
electric current
frequency shift
injection
integrated circuits
logic
Integrated circuits
Film thickness
film thickness
Electronic equipment
Spectroscopy
Magnetic fields
electronics

Keywords

  • magnon
  • magnonics
  • spin waves

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Current-induced modulation of backward spin-waves in metallic microstructures. / Sato, Nana; Lee, Seo Won; Lee, Kyung Jin; Sekiguchi, Koji.

In: Journal of Physics D: Applied Physics, Vol. 50, No. 9, 094004, 06.02.2017.

Research output: Contribution to journalArticle

Sato, Nana ; Lee, Seo Won ; Lee, Kyung Jin ; Sekiguchi, Koji. / Current-induced modulation of backward spin-waves in metallic microstructures. In: Journal of Physics D: Applied Physics. 2017 ; Vol. 50, No. 9.
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