skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on October 2, 2020

Title: Long lifetime of thermally excited magnons in bulk yttrium iron garnet

Abstract

Spin currents are generated within the bulk of magnetic materials due to heat flow, an effect called intrinsic spin Seebeck. This bulk bosonic spin current consists of a diffusing thermal magnon cloud, parametrized by the magnon chemical potential (μ m), with a diffusion length of several microns in yttrium iron garnet (YIG). Transient optothermal measurements of the spin-Seebeck effect (SSE) as a function of temperature reveal the time evolution of μ m due to intrinsic SSE in YIG. The interface SSE develops at times <2 ns while the intrinsic SSE signal continues to evolve at times >500 μs, dominating the temperature dependence of SSE in bulk YIG. Time-dependent SSE data are fit to a multitemperature model of coupled spin/heat transport using the finite-element method (FEM), where the magnon spin lifetime (τ) and magnon-phonon thermalization time (τ mp) are used as fit parameters. From 300 to 4 K, τ mp) varies from 1 to 10 ns, whereas tau varies from 2 to 60 μ s with the spin lifetime peaking at 90 K. At low temperature, a reduction in τ is observed consistent with impurity relaxation reported in ferromagnetic resonance measurements. Finally, these results demonstrate that the thermal magnon cloud inmore » YIG contains extremely low-frequency magnons (similar to 10 GHz), providing spectral insight to the microscopic scattering processes involved in magnon spin/heat diffusion.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); US Army Research Office (ARO)
OSTI Identifier:
1594137
Report Number(s):
OSU-01304
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
SC0001304; DMR-1420451; MURI W911NF-14-1-0016; FG02-03ER46054
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 13; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Magnons; lifetime; YIG; ferrimagnetism; magnetism; Spin Seebeck effect; spin caloritronics; spin current; spin diffusion; spin relaxation; spin waves

Citation Formats

Jamison, John S., Yang, Zihao, Giles, Brandon L., Brangham, Jack T., Wu, Guanzhong, Hammel, P. Chris, Yang, Fengyuan, and Myers, Roberto C. Long lifetime of thermally excited magnons in bulk yttrium iron garnet. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.134402.
Jamison, John S., Yang, Zihao, Giles, Brandon L., Brangham, Jack T., Wu, Guanzhong, Hammel, P. Chris, Yang, Fengyuan, & Myers, Roberto C. Long lifetime of thermally excited magnons in bulk yttrium iron garnet. United States. doi:10.1103/PhysRevB.100.134402.
Jamison, John S., Yang, Zihao, Giles, Brandon L., Brangham, Jack T., Wu, Guanzhong, Hammel, P. Chris, Yang, Fengyuan, and Myers, Roberto C. Wed . "Long lifetime of thermally excited magnons in bulk yttrium iron garnet". United States. doi:10.1103/PhysRevB.100.134402.
@article{osti_1594137,
title = {Long lifetime of thermally excited magnons in bulk yttrium iron garnet},
author = {Jamison, John S. and Yang, Zihao and Giles, Brandon L. and Brangham, Jack T. and Wu, Guanzhong and Hammel, P. Chris and Yang, Fengyuan and Myers, Roberto C.},
abstractNote = {Spin currents are generated within the bulk of magnetic materials due to heat flow, an effect called intrinsic spin Seebeck. This bulk bosonic spin current consists of a diffusing thermal magnon cloud, parametrized by the magnon chemical potential (μm), with a diffusion length of several microns in yttrium iron garnet (YIG). Transient optothermal measurements of the spin-Seebeck effect (SSE) as a function of temperature reveal the time evolution of μm due to intrinsic SSE in YIG. The interface SSE develops at times <2 ns while the intrinsic SSE signal continues to evolve at times >500 μs, dominating the temperature dependence of SSE in bulk YIG. Time-dependent SSE data are fit to a multitemperature model of coupled spin/heat transport using the finite-element method (FEM), where the magnon spin lifetime (τ) and magnon-phonon thermalization time (τmp) are used as fit parameters. From 300 to 4 K, τmp) varies from 1 to 10 ns, whereas tau varies from 2 to 60 μs with the spin lifetime peaking at 90 K. At low temperature, a reduction in τ is observed consistent with impurity relaxation reported in ferromagnetic resonance measurements. Finally, these results demonstrate that the thermal magnon cloud in YIG contains extremely low-frequency magnons (similar to 10 GHz), providing spectral insight to the microscopic scattering processes involved in magnon spin/heat diffusion.},
doi = {10.1103/PhysRevB.100.134402},
journal = {Physical Review B},
number = 13,
volume = 100,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 2, 2020
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Direct electronic measurement of the spin Hall effect
journal, July 2006


Effect of the magnon dispersion on the longitudinal spin Seebeck effect in yttrium iron garnets
journal, August 2015


Thermally driven long-range magnon spin currents in yttrium iron garnet due to intrinsic spin Seebeck effect
journal, November 2017


Two-Fluid Theory for Spin Superfluidity in Magnetic Insulators
journal, March 2016


Electron-phonon coupling and electron heat capacity of metals under conditions of strong electron-phonon nonequilibrium
journal, February 2008


Origin of the spin Seebeck effect in compensated ferrimagnets
journal, February 2016

  • Geprägs, Stephan; Kehlberger, Andreas; Coletta, Francesco Della
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms10452

Ferromagnetic resonance linewidth in metallic thin films: Comparison of measurement methods
journal, May 2006

  • Kalarickal, Sangita S.; Krivosik, Pavol; Wu, Mingzhong
  • Journal of Applied Physics, Vol. 99, Issue 9
  • DOI: 10.1063/1.2197087

Increased low-temperature damping in yttrium iron garnet thin films
journal, May 2017


Role of bulk-magnon transport in the temporal evolution of the longitudinal spin-Seebeck effect
journal, June 2014


Magnon-phonon relaxation in yttrium iron garnet from first principles
journal, November 2017


Local Charge and Spin Currents in Magnetothermal Landscapes
journal, March 2012


Longitudinal spin Seebeck effect in various garnet ferrites
journal, March 2013


Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere
journal, February 2017

  • Klingler, S.; Maier-Flaig, H.; Dubs, C.
  • Applied Physics Letters, Vol. 110, Issue 9
  • DOI: 10.1063/1.4977423

Dynamic phase diagram of dc-pumped magnon condensates
journal, September 2014


Conversion of spin current into charge current at room temperature: Inverse spin-Hall effect
journal, May 2006

  • Saitoh, E.; Ueda, M.; Miyajima, H.
  • Applied Physics Letters, Vol. 88, Issue 18
  • DOI: 10.1063/1.2199473

Observation of longitudinal spin-Seebeck effect in magnetic insulators
journal, October 2010

  • Uchida, Ken-ichi; Adachi, Hiroto; Ota, Takeru
  • Applied Physics Letters, Vol. 97, Issue 17
  • DOI: 10.1063/1.3507386

Complete Suppression of Longitudinal Spin Seebeck Effect by Frozen Magnetization Dynamics in Y 3 Fe 5 O 12
journal, June 2016

  • Kikkawa, Takashi; Uchida, Ken-ichi; Daimon, Shunsuke
  • Journal of the Physical Society of Japan, Vol. 85, Issue 6
  • DOI: 10.7566/JPSJ.85.065003

Critical suppression of spin Seebeck effect by magnetic fields
journal, August 2015


Long-distance transport of magnon spin information in a magnetic insulator at room temperature
journal, September 2015

  • Cornelissen, L. J.; Liu, J.; Duine, R. A.
  • Nature Physics, Vol. 11, Issue 12
  • DOI: 10.1038/nphys3465

Kapitza conductance and heat flow between solids at temperatures from 50 to 300 K
journal, December 1993


Direct Measurement of Magnon Temperature: New Insight into Magnon-Phonon Coupling in Magnetic Insulators
journal, September 2013


Direct observation of magnon-phonon coupling in yttrium iron garnet
journal, September 2017


Elastic Constants of Single‐Crystal YIG
journal, June 1961

  • Clark, A. E.; Strakna, R. E.
  • Journal of Applied Physics, Vol. 32, Issue 6
  • DOI: 10.1063/1.1736184

Evidence for the role of the magnon energy relaxation length in the spin Seebeck effect
journal, January 2018


Magnon thermal mean free path in yttrium iron garnet
journal, August 2014


Thickness- and temperature-dependent magnetodynamic properties of yttrium iron garnet thin films
journal, May 2015

  • Haidar, M.; Ranjbar, M.; Balinsky, M.
  • Journal of Applied Physics, Vol. 117, Issue 17
  • DOI: 10.1063/1.4914363

Long-range pure magnon spin diffusion observed in a nonlocal spin-Seebeck geometry
journal, December 2015


Magnetoelastic modes and lifetime of magnons in thin yttrium iron garnet films
journal, May 2014


Length Scale of the Spin Seebeck Effect
journal, August 2015


Influence of Thickness and Interface on the Low-Temperature Enhancement of the Spin Seebeck Effect in YIG Films
journal, July 2016


Thermoelectric Generation Based on Spin Seebeck Effects
journal, October 2016


Time-resolved study of field-induced suppression of longitudinal spin Seebeck effect
journal, June 2017

  • Hioki, Tomosato; Iguchi, Ryo; Qiu, Zhiyong
  • Applied Physics Express, Vol. 10, Issue 7
  • DOI: 10.7567/APEX.10.073002

Magnon, phonon, and electron temperature profiles and the spin Seebeck effect in magnetic insulator/normal metal hybrid structures
journal, September 2013


Magnon spin-current theory for the longitudinal spin-Seebeck effect
journal, January 2014


Microwave-induced spin currents in ferromagnetic-insulator|normal-metal bilayer system
journal, September 2014

  • Agrawal, Milan; Serga, Alexander A.; Lauer, Viktor
  • Applied Physics Letters, Vol. 105, Issue 9
  • DOI: 10.1063/1.4894636

Theory of spin Hall magnetoresistance
journal, April 2013


Scaling of Spin Hall Angle in 3d, 4d, and 5d Metals from Y 3 Fe 5 O 12 /Metal Spin Pumping
journal, May 2014


Picosecond Spin Seebeck Effect
journal, February 2017


Temperature dependence of the magnon spin diffusion length and magnon spin conductivity in the magnetic insulator yttrium iron garnet
journal, November 2016


Spin convertance at magnetic interfaces
journal, December 2012


Electrical and Thermal Conduction in Atomic Layer Deposition Nanobridges Down to 7 nm Thickness
journal, January 2012

  • Yoneoka, Shingo; Lee, Jaeho; Liger, Matthieu
  • Nano Letters, Vol. 12, Issue 2
  • DOI: 10.1021/nl203548w

Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
journal, July 2016


Imaging Magnetization Structure and Dynamics in Ultrathin Y 3 Fe 5 O 12 / Pt Bilayers with High Sensitivity Using the Time-Resolved Longitudinal Spin Seebeck Effect
journal, April 2017


Electronic Pumping of Quasiequilibrium Bose-Einstein-Condensed Magnons
journal, June 2012


Spin wave stiffness constants in some ferrimagnetics
journal, March 1987


Temperature-dependent magnetic damping of yttrium iron garnet spheres
journal, June 2017


Significant reduction in spin pumping efficiency in a platinum/yttrium iron garnet bilayer at low temperature
journal, April 2016

  • Shigematsu, Ei; Ando, Yuichiro; Ohshima, Ryo
  • Applied Physics Express, Vol. 9, Issue 5
  • DOI: 10.7567/APEX.9.053002

Observation of the spin Seebeck effect
journal, October 2008


Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
journal, September 2015

  • Bartell, J. M.; Ngai, D. H.; Leng, Z.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms9460