Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic HoMnO3

Bowlan, P.; Trugman, S. A.; Bowlan, J.; Zhu, J. -X.; Hur, N. J.; Taylor, A. J.; Yarotski, D. A.; Prasankumar, R. P.

doi:10.1103/PhysRevB.94.100404

Title: Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic ${HoMnO}_{3}$

Abstract

Here, we demonstrate an approach for directly tracking antiferromagnetic (AFM) spin dynamics by measuring ultrafast changes in a magnon resonance. We also test this idea on the multiferroic HoMnO ₃ by optically photoexciting electrons, after which changes in the spin order are probed with a THz pulse tuned to a magnon resonance. This reveals a photoinduced change in the magnon line shape that builds up over 5–12 picoseconds, which we show to be the spin-lattice thermalization time, indicating that electrons heat the spins via phonons. We compare our results to previous studies of spin-lattice thermalization in ferromagnetic manganites, giving insight into fundamental differences between the two systems. Finally, our work sheds light on the microscopic mechanism governing spin-phonon interactions in AFMs and demonstrates a powerful approach for directly monitoring ultrafast spin dynamics.

Authors:

Bowlan, P. ^[1]; Trugman, S. A. ^[1]; Bowlan, J. ^[1]; Zhu, J. -X. ^[1]; Hur, N. J. ^[2]; Taylor, A. J. ^[1]; Yarotski, D. A. ^[1]; Prasankumar, R. P. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies
Inha Univ., Icheon (Korea). Dept. of Physics

Publication Date:: Mon Sep 26 00:00:00 EDT 2016

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1340915

Alternate Identifier(s):: OSTI ID: 1326710

Report Number(s):: LA-UR-16-20867
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1701607

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 94; Journal Issue: 10; 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; Material Science

Citation Formats


                    Bowlan, P., Trugman, S. A., Bowlan, J., Zhu, J. -X., Hur, N. J., Taylor, A. J., Yarotski, D. A., and Prasankumar, R. P. Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic HoMnO3.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.94.100404.

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                    Bowlan, P., Trugman, S. A., Bowlan, J., Zhu, J. -X., Hur, N. J., Taylor, A. J., Yarotski, D. A., & Prasankumar, R. P. Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic HoMnO3.  United States.  https://doi.org/10.1103/PhysRevB.94.100404

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                    Bowlan, P., Trugman, S. A., Bowlan, J., Zhu, J. -X., Hur, N. J., Taylor, A. J., Yarotski, D. A., and Prasankumar, R. P. Mon .  
"Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic HoMnO3".  United States.  https://doi.org/10.1103/PhysRevB.94.100404.  https://www.osti.gov/servlets/purl/1340915.

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@article{osti_1340915,

  title        = {Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic HoMnO3},

  author       = {Bowlan, P. and Trugman, S. A. and Bowlan, J. and Zhu, J. -X. and Hur, N. J. and Taylor, A. J. and Yarotski, D. A. and Prasankumar, R. P.},

  abstractNote = {Here, we demonstrate an approach for directly tracking antiferromagnetic (AFM) spin dynamics by measuring ultrafast changes in a magnon resonance. We also test this idea on the multiferroic HoMnO 3 by optically photoexciting electrons, after which changes in the spin order are probed with a THz pulse tuned to a magnon resonance. This reveals a photoinduced change in the magnon line shape that builds up over 5–12 picoseconds, which we show to be the spin-lattice thermalization time, indicating that electrons heat the spins via phonons. We compare our results to previous studies of spin-lattice thermalization in ferromagnetic manganites, giving insight into fundamental differences between the two systems. Finally, our work sheds light on the microscopic mechanism governing spin-phonon interactions in AFMs and demonstrates a powerful approach for directly monitoring ultrafast spin dynamics.},

  doi          = {10.1103/PhysRevB.94.100404},

  journal      = {Physical Review B},

  number       = 10,

  volume       = 94,

  place        = {United States},

  year         = {Mon Sep 26 00:00:00 EDT 2016},

  month        = {Mon Sep 26 00:00:00 EDT 2016}

}

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Works referencing / citing this record:

Using ultrashort terahertz pulses to directly probe spin dynamics in insulating antiferromagnets
journal, April 2018

Bowlan, P.; Trugman, S. A.; Yarotski, D. A.
Journal of Physics D: Applied Physics, Vol. 51, Issue 19
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How to manipulate magnetic states of antiferromagnets
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Song, Cheng; You, Yunfeng; Chen, Xianzhe
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Lattice-mediated magnetic order melting in ${TbMnO}_{3}$
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Coherent phonons in a ${Bi}_{2} {Se}_{3}$ film generated by an intense single-cycle THz pulse
journal, June 2018

Melnikov, A. A.; Boldyrev, K. N.; Selivanov, Yu. G.
Physical Review B, Vol. 97, Issue 21
DOI: 10.1103/physrevb.97.214304

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Title: Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic HoMnO 3

Abstract

Citation Formats

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Controlling coherent and incoherent spin dynamics by steering the photoinduced energy flow journal, February 2014

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Laser-induced ultrafast spin reorientation in the antiferromagnet TmFeO3 journal, June 2004

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Giant magnetoelectric effect in multiferroic HoMnO 3 with a high ferroelectric transition temperature journal, April 2009

Magnetic Order and Spin Dynamics in Ferroelectric H o M n O 3 journal, March 2005

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Title: Probing ultrafast spin dynamics through a magnon resonance in the antiferromagnetic multiferroic ${HoMnO}_{3}$

Ultrafast optical and far-infrared quasiparticle dynamics in correlated electron materials
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Controlling coherent and incoherent spin dynamics by steering the photoinduced energy flow
journal, February 2014

Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4
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Spin-dependent polaron formation dynamics in ${Eu}_{0.75} Y_{0.25} {MnO}_{3}$ probed by femtosecond pump-probe spectroscopy
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Coherent terahertz control of antiferromagnetic spin waves
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Evolution of three-dimensional correlations during the photoinduced melting of antiferromagnetic order in La $_{0.5}$ Sr $_{1.5}$ MnO $_{4}$
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Magnons and crystal-field transitions in hexagonal $R$ MnO $_{3}$ ( $R$ = Er, Tm, Yb, Lu) single crystals
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Giant magnetoelectric effect in multiferroic ${HoMnO}_{3}$ with a high ferroelectric transition temperature
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Spin-charge coupling and the high-energy magnetodielectric effect in hexagonal $Ho Mn O_{3}$
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Magnetization dynamics and the ${Mn}^{3 +}$ $d − d$ excitation of hexagonal ${HoMnO}_{3}$ single crystals using wavelength-tunable time-resolved femtosecond spectroscopy
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journal, March 1969

Dynamics and Control in Complex Transition Metal Oxides
journal, July 2014

Coexistence of coupled magnetic phases in epitaxial TbMnO ₃ films revealed by ultrafast optical spectroscopy
journal, September 2012

Observation of coupled magnetic and electric domains
journal, October 2002

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Strong spin-lattice coupling in multiferroic hexagonal manganite YMnO3 probed by ultrafast optical spectroscopy
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Magnetic order dynamics in optically excited multiferroic $TbMn O_{3}$
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journal, June 2001

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journal, September 2006

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Using ultrashort terahertz pulses to directly probe spin dynamics in insulating antiferromagnets
journal, April 2018

How to manipulate magnetic states of antiferromagnets
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