Geometry dependence on inverse spin Hall effect induced by spin pumping in Ni 81Fe 19/Pt films

H. Nakayama, Kazuya Ando, K. Harii, T. Yoshino, R. Takahashi, Y. Kajiwara, K. Uchida, Y. Fujikawa, E. Saitoh

Research output: Contribution to journalArticle

132 Citations (Scopus)

Abstract

Geometric effects on the inverse spin Hall effect (ISHE) induced by the spin pumping driven by the ferromagnetic resonance (FMR) have been investigated quantitatively. We measured the FMR spectra and the electromotive force induced by the ISHE with changing the size and the thickness in Ni 81Fe 19/Pt films. The intensity of generated charge currents due to the ISHE changes systematically with changing the film geometry, which is consistent with the prediction of the ISHE. The experimental results show a clear difference between Ni 81Fe 19 and Pt thickness dependence of the ISHE induced by the spin pumping. With a constant Pt thickness, the intensity of the generated charge current is kept proportional to that of the injected spin-current density, which decreases with increased spin relaxation in the Ni 81Fe 19 layer due to interfacial effect, inversely proportional to its film thickness. On the other hand, reflecting the spin diffusion mechanism in the Pt layer, the charge current decreases significantly with the decrease of the Pt thickness, while injected spin-current density is almost kept constant.

Original languageEnglish
Article number144408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number14
DOIs
Publication statusPublished - 2012 Apr 12
Externally publishedYes

Fingerprint

Spin Hall effect
Hall effect
pumping
Geometry
geometry
Ferromagnetic resonance
Current density
Electromotive force
ferromagnetic resonance
Film thickness
current density
electromotive forces

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Geometry dependence on inverse spin Hall effect induced by spin pumping in Ni 81Fe 19/Pt films. / Nakayama, H.; Ando, Kazuya; Harii, K.; Yoshino, T.; Takahashi, R.; Kajiwara, Y.; Uchida, K.; Fujikawa, Y.; Saitoh, E.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 14, 144408, 12.04.2012.

Research output: Contribution to journalArticle

Nakayama, H. ; Ando, Kazuya ; Harii, K. ; Yoshino, T. ; Takahashi, R. ; Kajiwara, Y. ; Uchida, K. ; Fujikawa, Y. ; Saitoh, E. / Geometry dependence on inverse spin Hall effect induced by spin pumping in Ni 81Fe 19/Pt films. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 14.
@article{cddf856f02cb47429779c1fd4e7d62df,
title = "Geometry dependence on inverse spin Hall effect induced by spin pumping in Ni 81Fe 19/Pt films",
abstract = "Geometric effects on the inverse spin Hall effect (ISHE) induced by the spin pumping driven by the ferromagnetic resonance (FMR) have been investigated quantitatively. We measured the FMR spectra and the electromotive force induced by the ISHE with changing the size and the thickness in Ni 81Fe 19/Pt films. The intensity of generated charge currents due to the ISHE changes systematically with changing the film geometry, which is consistent with the prediction of the ISHE. The experimental results show a clear difference between Ni 81Fe 19 and Pt thickness dependence of the ISHE induced by the spin pumping. With a constant Pt thickness, the intensity of the generated charge current is kept proportional to that of the injected spin-current density, which decreases with increased spin relaxation in the Ni 81Fe 19 layer due to interfacial effect, inversely proportional to its film thickness. On the other hand, reflecting the spin diffusion mechanism in the Pt layer, the charge current decreases significantly with the decrease of the Pt thickness, while injected spin-current density is almost kept constant.",
author = "H. Nakayama and Kazuya Ando and K. Harii and T. Yoshino and R. Takahashi and Y. Kajiwara and K. Uchida and Y. Fujikawa and E. Saitoh",
year = "2012",
month = "4",
day = "12",
doi = "10.1103/PhysRevB.85.144408",
language = "English",
volume = "85",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "14",

}

TY - JOUR

T1 - Geometry dependence on inverse spin Hall effect induced by spin pumping in Ni 81Fe 19/Pt films

AU - Nakayama, H.

AU - Ando, Kazuya

AU - Harii, K.

AU - Yoshino, T.

AU - Takahashi, R.

AU - Kajiwara, Y.

AU - Uchida, K.

AU - Fujikawa, Y.

AU - Saitoh, E.

PY - 2012/4/12

Y1 - 2012/4/12

N2 - Geometric effects on the inverse spin Hall effect (ISHE) induced by the spin pumping driven by the ferromagnetic resonance (FMR) have been investigated quantitatively. We measured the FMR spectra and the electromotive force induced by the ISHE with changing the size and the thickness in Ni 81Fe 19/Pt films. The intensity of generated charge currents due to the ISHE changes systematically with changing the film geometry, which is consistent with the prediction of the ISHE. The experimental results show a clear difference between Ni 81Fe 19 and Pt thickness dependence of the ISHE induced by the spin pumping. With a constant Pt thickness, the intensity of the generated charge current is kept proportional to that of the injected spin-current density, which decreases with increased spin relaxation in the Ni 81Fe 19 layer due to interfacial effect, inversely proportional to its film thickness. On the other hand, reflecting the spin diffusion mechanism in the Pt layer, the charge current decreases significantly with the decrease of the Pt thickness, while injected spin-current density is almost kept constant.

AB - Geometric effects on the inverse spin Hall effect (ISHE) induced by the spin pumping driven by the ferromagnetic resonance (FMR) have been investigated quantitatively. We measured the FMR spectra and the electromotive force induced by the ISHE with changing the size and the thickness in Ni 81Fe 19/Pt films. The intensity of generated charge currents due to the ISHE changes systematically with changing the film geometry, which is consistent with the prediction of the ISHE. The experimental results show a clear difference between Ni 81Fe 19 and Pt thickness dependence of the ISHE induced by the spin pumping. With a constant Pt thickness, the intensity of the generated charge current is kept proportional to that of the injected spin-current density, which decreases with increased spin relaxation in the Ni 81Fe 19 layer due to interfacial effect, inversely proportional to its film thickness. On the other hand, reflecting the spin diffusion mechanism in the Pt layer, the charge current decreases significantly with the decrease of the Pt thickness, while injected spin-current density is almost kept constant.

UR - http://www.scopus.com/inward/record.url?scp=84860289177&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860289177&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.144408

DO - 10.1103/PhysRevB.85.144408

M3 - Article

AN - SCOPUS:84860289177

VL - 85

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 14

M1 - 144408

ER -