Spin Pumping Driven by Magnon Polarons

Hiroki Hayashi, Kazuya Ando

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report the observation of a resonant enhancement of spin pumping induced by magnon-phonon coupling at room temperature. We show that the spin pumping driven by microwave parametric excitation is enhanced, compared to its purely magnonic value, when the microwave excites dipole-exchange magnons in the proximity of the intersection of the uncoupled magnon and phonon dispersions. This observation is consistent with a model of the spin pumping driven by hybridized magnon-phonon modes, magnon polarons, where the spin-pumping efficiency depends on the relative scattering strengths of the magnons and phonons in a magnetic insulator.

Original languageEnglish
Article number237202
JournalPhysical Review Letters
Volume121
Issue number23
DOIs
Publication statusPublished - 2018 Dec 4

Fingerprint

polarons
pumping
magnons
microwaves
intersections
proximity
phonons
insulators
dipoles
augmentation
room temperature
scattering
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Spin Pumping Driven by Magnon Polarons. / Hayashi, Hiroki; Ando, Kazuya.

In: Physical Review Letters, Vol. 121, No. 23, 237202, 04.12.2018.

Research output: Contribution to journalArticle

Hayashi, Hiroki ; Ando, Kazuya. / Spin Pumping Driven by Magnon Polarons. In: Physical Review Letters. 2018 ; Vol. 121, No. 23.
@article{33bec5cc9a6b4cbe8164e6db2c06dd69,
title = "Spin Pumping Driven by Magnon Polarons",
abstract = "We report the observation of a resonant enhancement of spin pumping induced by magnon-phonon coupling at room temperature. We show that the spin pumping driven by microwave parametric excitation is enhanced, compared to its purely magnonic value, when the microwave excites dipole-exchange magnons in the proximity of the intersection of the uncoupled magnon and phonon dispersions. This observation is consistent with a model of the spin pumping driven by hybridized magnon-phonon modes, magnon polarons, where the spin-pumping efficiency depends on the relative scattering strengths of the magnons and phonons in a magnetic insulator.",
author = "Hiroki Hayashi and Kazuya Ando",
year = "2018",
month = "12",
day = "4",
doi = "10.1103/PhysRevLett.121.237202",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "23",

}

TY - JOUR

T1 - Spin Pumping Driven by Magnon Polarons

AU - Hayashi, Hiroki

AU - Ando, Kazuya

PY - 2018/12/4

Y1 - 2018/12/4

N2 - We report the observation of a resonant enhancement of spin pumping induced by magnon-phonon coupling at room temperature. We show that the spin pumping driven by microwave parametric excitation is enhanced, compared to its purely magnonic value, when the microwave excites dipole-exchange magnons in the proximity of the intersection of the uncoupled magnon and phonon dispersions. This observation is consistent with a model of the spin pumping driven by hybridized magnon-phonon modes, magnon polarons, where the spin-pumping efficiency depends on the relative scattering strengths of the magnons and phonons in a magnetic insulator.

AB - We report the observation of a resonant enhancement of spin pumping induced by magnon-phonon coupling at room temperature. We show that the spin pumping driven by microwave parametric excitation is enhanced, compared to its purely magnonic value, when the microwave excites dipole-exchange magnons in the proximity of the intersection of the uncoupled magnon and phonon dispersions. This observation is consistent with a model of the spin pumping driven by hybridized magnon-phonon modes, magnon polarons, where the spin-pumping efficiency depends on the relative scattering strengths of the magnons and phonons in a magnetic insulator.

UR - http://www.scopus.com/inward/record.url?scp=85057742181&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057742181&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.121.237202

DO - 10.1103/PhysRevLett.121.237202

M3 - Article

C2 - 30576197

AN - SCOPUS:85057742181

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 23

M1 - 237202

ER -