Colossal magnon-phonon coupling in multiferroic Eu0.75 Y0.25 Mn O3

R. Valdés Aguilar, A. B. Sushkov, C. L. Zhang, Y. J. Choi, S. W. Cheong, H. D. Drew

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

We report the spectra of magnetically induced electric dipole absorption in Eu0.75 Y0.25 Mn O3 from temperature-dependent far-infrared spectroscopy (10-250 cm-1). These spectra, which occur only in the e a polarization, consist of two relatively narrow electromagnon features with onset at TFE =30 K and a broad absorption band that persists to temperatures well above TN =47 K. The observed excitations account for the step up of the static dielectric constant in the ferroelectric phase. The electromagnon at 80 cm-1 is observed to be strongly coupled to the nearby lowest optical phonon which transfers more than 1/2 of its spectral weight to the magnon. We attribute the origin of the broad background absorption to the two-magnon-emission decay process of the phonon.

Original languageEnglish
Article number060404
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number6
DOIs
Publication statusPublished - 2007 Aug 15

Fingerprint

Polytetrafluoroethylene
electric dipoles
Ferroelectric materials
Absorption spectra
Infrared spectroscopy
Permittivity
infrared spectroscopy
Polarization
permittivity
absorption spectra
Temperature
temperature
decay
polarization
excitation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Valdés Aguilar, R. ; Sushkov, A. B. ; Zhang, C. L. ; Choi, Y. J. ; Cheong, S. W. ; Drew, H. D. / Colossal magnon-phonon coupling in multiferroic Eu0.75 Y0.25 Mn O3. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 76, No. 6.
@article{c8931baede9a4166bb7d4beac2270155,
title = "Colossal magnon-phonon coupling in multiferroic Eu0.75 Y0.25 Mn O3",
abstract = "We report the spectra of magnetically induced electric dipole absorption in Eu0.75 Y0.25 Mn O3 from temperature-dependent far-infrared spectroscopy (10-250 cm-1). These spectra, which occur only in the e a polarization, consist of two relatively narrow electromagnon features with onset at TFE =30 K and a broad absorption band that persists to temperatures well above TN =47 K. The observed excitations account for the step up of the static dielectric constant in the ferroelectric phase. The electromagnon at 80 cm-1 is observed to be strongly coupled to the nearby lowest optical phonon which transfers more than 1/2 of its spectral weight to the magnon. We attribute the origin of the broad background absorption to the two-magnon-emission decay process of the phonon.",
author = "{Vald{\'e}s Aguilar}, R. and Sushkov, {A. B.} and Zhang, {C. L.} and Choi, {Y. J.} and Cheong, {S. W.} and Drew, {H. D.}",
year = "2007",
month = "8",
day = "15",
doi = "10.1103/PhysRevB.76.060404",
language = "English",
volume = "76",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "6",

}

Colossal magnon-phonon coupling in multiferroic Eu0.75 Y0.25 Mn O3. / Valdés Aguilar, R.; Sushkov, A. B.; Zhang, C. L.; Choi, Y. J.; Cheong, S. W.; Drew, H. D.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 6, 060404, 15.08.2007.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Colossal magnon-phonon coupling in multiferroic Eu0.75 Y0.25 Mn O3

AU - Valdés Aguilar, R.

AU - Sushkov, A. B.

AU - Zhang, C. L.

AU - Choi, Y. J.

AU - Cheong, S. W.

AU - Drew, H. D.

PY - 2007/8/15

Y1 - 2007/8/15

N2 - We report the spectra of magnetically induced electric dipole absorption in Eu0.75 Y0.25 Mn O3 from temperature-dependent far-infrared spectroscopy (10-250 cm-1). These spectra, which occur only in the e a polarization, consist of two relatively narrow electromagnon features with onset at TFE =30 K and a broad absorption band that persists to temperatures well above TN =47 K. The observed excitations account for the step up of the static dielectric constant in the ferroelectric phase. The electromagnon at 80 cm-1 is observed to be strongly coupled to the nearby lowest optical phonon which transfers more than 1/2 of its spectral weight to the magnon. We attribute the origin of the broad background absorption to the two-magnon-emission decay process of the phonon.

AB - We report the spectra of magnetically induced electric dipole absorption in Eu0.75 Y0.25 Mn O3 from temperature-dependent far-infrared spectroscopy (10-250 cm-1). These spectra, which occur only in the e a polarization, consist of two relatively narrow electromagnon features with onset at TFE =30 K and a broad absorption band that persists to temperatures well above TN =47 K. The observed excitations account for the step up of the static dielectric constant in the ferroelectric phase. The electromagnon at 80 cm-1 is observed to be strongly coupled to the nearby lowest optical phonon which transfers more than 1/2 of its spectral weight to the magnon. We attribute the origin of the broad background absorption to the two-magnon-emission decay process of the phonon.

UR - http://www.scopus.com/inward/record.url?scp=34548043263&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548043263&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.76.060404

DO - 10.1103/PhysRevB.76.060404

M3 - Article

AN - SCOPUS:34548043263

VL - 76

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 6

M1 - 060404

ER -