Identifying the spectroscopic modes of multiferroic BiFeO3

Randy S. Fishman; Nobuo Furukawa; Jason T. Haraldsen; Masaaki Matsuda; Shin Miyahara

doi:10.1103/PhysRevB.86.220402

Identifying the spectroscopic modes of multiferroic BiFeO₃

Randy S. Fishman
, Nobuo Furukawa
, Jason T. Haraldsen
, Masaaki Matsuda
, Shin Miyahara

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

We have identified the modes of multiferroic BiFeO₃ measured by THz and Raman spectroscopies. Excellent agreement with the observed peaks is obtained by including the effects of easy-axis anisotropy along the direction of the electric polarization. By distorting the cycloidal spin state, anisotropy splits the Ψ_±1 mode into peaks at 20 and 21.5 cm ^-1 and activates the lower Φ_±2 mode at 27 cm^-1 (T=200 K). An electromagnon is identified with the upper Ψ_±1 mode at 21.5 cm^-1. Our results also explain recent inelastic neutron-scattering measurements.

Original language	English
Article number	220402
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.86.220402
State	Published - Dec 19 2012

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10.1103/PhysRevB.86.220402

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title = "Identifying the spectroscopic modes of multiferroic BiFeO3",

abstract = "We have identified the modes of multiferroic BiFeO3 measured by THz and Raman spectroscopies. Excellent agreement with the observed peaks is obtained by including the effects of easy-axis anisotropy along the direction of the electric polarization. By distorting the cycloidal spin state, anisotropy splits the Ψ±1 mode into peaks at 20 and 21.5 cm -1 and activates the lower Φ±2 mode at 27 cm-1 (T=200 K). An electromagnon is identified with the upper Ψ±1 mode at 21.5 cm-1. Our results also explain recent inelastic neutron-scattering measurements.",

author = "Fishman, \{Randy S.\} and Nobuo Furukawa and Haraldsen, \{Jason T.\} and Masaaki Matsuda and Shin Miyahara",

year = "2012",

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doi = "10.1103/PhysRevB.86.220402",

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T1 - Identifying the spectroscopic modes of multiferroic BiFeO3

AU - Fishman, Randy S.

AU - Furukawa, Nobuo

AU - Haraldsen, Jason T.

AU - Matsuda, Masaaki

AU - Miyahara, Shin

PY - 2012/12/19

Y1 - 2012/12/19

N2 - We have identified the modes of multiferroic BiFeO3 measured by THz and Raman spectroscopies. Excellent agreement with the observed peaks is obtained by including the effects of easy-axis anisotropy along the direction of the electric polarization. By distorting the cycloidal spin state, anisotropy splits the Ψ±1 mode into peaks at 20 and 21.5 cm -1 and activates the lower Φ±2 mode at 27 cm-1 (T=200 K). An electromagnon is identified with the upper Ψ±1 mode at 21.5 cm-1. Our results also explain recent inelastic neutron-scattering measurements.

AB - We have identified the modes of multiferroic BiFeO3 measured by THz and Raman spectroscopies. Excellent agreement with the observed peaks is obtained by including the effects of easy-axis anisotropy along the direction of the electric polarization. By distorting the cycloidal spin state, anisotropy splits the Ψ±1 mode into peaks at 20 and 21.5 cm -1 and activates the lower Φ±2 mode at 27 cm-1 (T=200 K). An electromagnon is identified with the upper Ψ±1 mode at 21.5 cm-1. Our results also explain recent inelastic neutron-scattering measurements.

UR - https://www.scopus.com/pages/publications/84871596607

U2 - 10.1103/PhysRevB.86.220402

DO - 10.1103/PhysRevB.86.220402

M3 - Article

AN - SCOPUS:84871596607

SN - 1098-0121

VL - 86

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

M1 - 220402

ER -

Identifying the spectroscopic modes of multiferroic BiFeO₃

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