Nonlinear spin-current enhancement enabled by spin-damping tuning

Hiroto Sakimura, Takaharu Tashiro, Kazuya Ando

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

When a magnon, the quanta of a spin excitation, is created in a magnet, this quasiparticle can split into two magnons, which triggers an angular momentum flow from the lattice to the spin subsystem. Although this process is known to enhance spin-current emission at metal/magnetic insulator interfaces, the role of interacting magnons in spintronic devices is still not well-understood. Here, we show that the enhanced spin-current emission is enabled by spin-damping tuning triggered by the redistribution of magnons. This is evidenced by time-resolved measurements of magnon lifetimes using the inverse spin Hall effect. Furthermore, we demonstrate nonlinear enhancement of the spin conversion triggered by scattering processes that conserve the number of magnons, illustrating the crucial role of spin-damping tuning in the nonlinear spin-current emission. These findings provide a crucial piece of information for the development of nonlinear spin-based devices, promising important advances in insulator spintronics.

Original languageEnglish
Article number5730
JournalNature Communications
Volume5
DOIs
Publication statusPublished - 2014

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Magnetoelectronics
Spin Hall effect
Tuning
Damping
damping
tuning
Equipment and Supplies
Magnets
augmentation
Angular momentum
Time measurement
Metals
magnons
Scattering
insulators
magnetic metals
Hall effect
magnets
angular momentum
actuators

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Nonlinear spin-current enhancement enabled by spin-damping tuning. / Sakimura, Hiroto; Tashiro, Takaharu; Ando, Kazuya.

In: Nature Communications, Vol. 5, 5730, 2014.

Research output: Contribution to journalArticle

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