Acoustic spin pumping: Direct generation of spin currents from sound waves in Pt/Y 3Fe 5O 12 hybrid structures

K. Uchida, Hiroto Adachi, T. An, H. Nakayama, M. Toda, B. Hillebrands, S. Maekawa, E. Saitoh

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Using a Pt/Y 3Fe 5O 12 (YIG) hybrid structure attached to a piezoelectric actuator, we demonstrate the generation of spin currents from sound waves. This acoustic spin pumping (ASP) is caused by the sound wave generated by the piezoelectric actuator, which then modulates the distribution function of magnons in the YIG layer and results in a pure-spin-current injection into the Pt layer across the Pt/YIG interface. In the Pt layer, this injected spin current is converted into an electric voltage due to the inverse spin-Hall effect (ISHE). The ISHE induced by the ASP is detected by measuring a voltage in the Pt layer at the piezoelectric resonance frequency of the actuator coupled with the Pt/YIG system. The frequency-dependent measurements enable us to separate the ASP-induced signals from extrinsic heating effects. Our model calculation based on the linear response theory provides us with a qualitative and quantitative understanding of the ASP in the Pt/YIG system.

Original languageEnglish
Article number053903
JournalJournal of Applied Physics
Volume111
Issue number5
DOIs
Publication statusPublished - Mar 1 2012

Fingerprint

hybrid structures
sound waves
pumping
yttrium-iron garnet
acoustics
piezoelectric actuators
Hall effect
electric potential
magnons
actuators
distribution functions
injection
heating

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Acoustic spin pumping : Direct generation of spin currents from sound waves in Pt/Y 3Fe 5O 12 hybrid structures. / Uchida, K.; Adachi, Hiroto; An, T.; Nakayama, H.; Toda, M.; Hillebrands, B.; Maekawa, S.; Saitoh, E.

In: Journal of Applied Physics, Vol. 111, No. 5, 053903, 01.03.2012.

Research output: Contribution to journalArticle

Uchida, K. ; Adachi, Hiroto ; An, T. ; Nakayama, H. ; Toda, M. ; Hillebrands, B. ; Maekawa, S. ; Saitoh, E. / Acoustic spin pumping : Direct generation of spin currents from sound waves in Pt/Y 3Fe 5O 12 hybrid structures. In: Journal of Applied Physics. 2012 ; Vol. 111, No. 5.
@article{6d2bb38307784d6bbb949513a54d5978,
title = "Acoustic spin pumping: Direct generation of spin currents from sound waves in Pt/Y 3Fe 5O 12 hybrid structures",
abstract = "Using a Pt/Y 3Fe 5O 12 (YIG) hybrid structure attached to a piezoelectric actuator, we demonstrate the generation of spin currents from sound waves. This acoustic spin pumping (ASP) is caused by the sound wave generated by the piezoelectric actuator, which then modulates the distribution function of magnons in the YIG layer and results in a pure-spin-current injection into the Pt layer across the Pt/YIG interface. In the Pt layer, this injected spin current is converted into an electric voltage due to the inverse spin-Hall effect (ISHE). The ISHE induced by the ASP is detected by measuring a voltage in the Pt layer at the piezoelectric resonance frequency of the actuator coupled with the Pt/YIG system. The frequency-dependent measurements enable us to separate the ASP-induced signals from extrinsic heating effects. Our model calculation based on the linear response theory provides us with a qualitative and quantitative understanding of the ASP in the Pt/YIG system.",
author = "K. Uchida and Hiroto Adachi and T. An and H. Nakayama and M. Toda and B. Hillebrands and S. Maekawa and E. Saitoh",
year = "2012",
month = "3",
day = "1",
doi = "10.1063/1.3688332",
language = "English",
volume = "111",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Acoustic spin pumping

T2 - Direct generation of spin currents from sound waves in Pt/Y 3Fe 5O 12 hybrid structures

AU - Uchida, K.

AU - Adachi, Hiroto

AU - An, T.

AU - Nakayama, H.

AU - Toda, M.

AU - Hillebrands, B.

AU - Maekawa, S.

AU - Saitoh, E.

PY - 2012/3/1

Y1 - 2012/3/1

N2 - Using a Pt/Y 3Fe 5O 12 (YIG) hybrid structure attached to a piezoelectric actuator, we demonstrate the generation of spin currents from sound waves. This acoustic spin pumping (ASP) is caused by the sound wave generated by the piezoelectric actuator, which then modulates the distribution function of magnons in the YIG layer and results in a pure-spin-current injection into the Pt layer across the Pt/YIG interface. In the Pt layer, this injected spin current is converted into an electric voltage due to the inverse spin-Hall effect (ISHE). The ISHE induced by the ASP is detected by measuring a voltage in the Pt layer at the piezoelectric resonance frequency of the actuator coupled with the Pt/YIG system. The frequency-dependent measurements enable us to separate the ASP-induced signals from extrinsic heating effects. Our model calculation based on the linear response theory provides us with a qualitative and quantitative understanding of the ASP in the Pt/YIG system.

AB - Using a Pt/Y 3Fe 5O 12 (YIG) hybrid structure attached to a piezoelectric actuator, we demonstrate the generation of spin currents from sound waves. This acoustic spin pumping (ASP) is caused by the sound wave generated by the piezoelectric actuator, which then modulates the distribution function of magnons in the YIG layer and results in a pure-spin-current injection into the Pt layer across the Pt/YIG interface. In the Pt layer, this injected spin current is converted into an electric voltage due to the inverse spin-Hall effect (ISHE). The ISHE induced by the ASP is detected by measuring a voltage in the Pt layer at the piezoelectric resonance frequency of the actuator coupled with the Pt/YIG system. The frequency-dependent measurements enable us to separate the ASP-induced signals from extrinsic heating effects. Our model calculation based on the linear response theory provides us with a qualitative and quantitative understanding of the ASP in the Pt/YIG system.

UR - http://www.scopus.com/inward/record.url?scp=84858995497&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84858995497&partnerID=8YFLogxK

U2 - 10.1063/1.3688332

DO - 10.1063/1.3688332

M3 - Article

AN - SCOPUS:84858995497

VL - 111

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 5

M1 - 053903

ER -