Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO3

Mariola O. Ramirez; M. Krishnamurthi; S. Denev; A. Kumar; Seung Yeul Yang; Ying Hao Chu; Eduardo Saiz; Jan Seidel; A. P. Pyatakov; A. Bush; D. Viehland; J. Orenstein; R. Ramesh; Venkatraman Gopalan

doi:10.1063/1.2829681

Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO₃

Mariola O. Ramirez, M. Krishnamurthi, S. Denev, A. Kumar, Seung Yeul Yang, Ying Hao Chu, Eduardo Saiz, Jan Seidel, A. P. Pyatakov, A. Bush, D. Viehland, J. Orenstein, R. Ramesh, Venkatraman Gopalan

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119 Scopus citations

Abstract

A prominent band centered at ∼1000-1300 cm-1 and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFe O3 thin films and single crystals. A strong anomaly in this band occurs at the antiferromagnetic Neel temperature, TN ∼375 °C. This band is composed of three peaks, assigned to 2 A4, 2 E8, and 2 E9 Raman modes. While all three peaks were found to be sensitive to the antiferromagnetic phase transition, the 2 E8 mode, in particular, nearly disappears at TN on heating, indicating a strong spin-two-phonon coupling in BiFe O3.

Original language	English (US)
Article number	022511
Journal	Applied Physics Letters
Volume	92
Issue number	2
DOIs	https://doi.org/10.1063/1.2829681
State	Published - 2008

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2829681

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title = "Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO3",

abstract = "A prominent band centered at ∼1000-1300 cm-1 and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFe O3 thin films and single crystals. A strong anomaly in this band occurs at the antiferromagnetic Neel temperature, TN ∼375 °C. This band is composed of three peaks, assigned to 2 A4, 2 E8, and 2 E9 Raman modes. While all three peaks were found to be sensitive to the antiferromagnetic phase transition, the 2 E8 mode, in particular, nearly disappears at TN on heating, indicating a strong spin-two-phonon coupling in BiFe O3.",

author = "Ramirez, {Mariola O.} and M. Krishnamurthi and S. Denev and A. Kumar and Yang, {Seung Yeul} and Chu, {Ying Hao} and Eduardo Saiz and Jan Seidel and Pyatakov, {A. P.} and A. Bush and D. Viehland and J. Orenstein and R. Ramesh and Venkatraman Gopalan",

note = "Funding Information: We acknowledge funding from the National Science Foundation under Grant Nos. DMR-0512165, DMR-0507146, DMR-0213623, and DMR-0602986.",

year = "2008",

doi = "10.1063/1.2829681",

language = "English (US)",

volume = "92",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "2",

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TY - JOUR

T1 - Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO3

AU - Ramirez, Mariola O.

AU - Krishnamurthi, M.

AU - Denev, S.

AU - Kumar, A.

AU - Yang, Seung Yeul

AU - Chu, Ying Hao

AU - Saiz, Eduardo

AU - Seidel, Jan

AU - Pyatakov, A. P.

AU - Bush, A.

AU - Viehland, D.

AU - Orenstein, J.

AU - Ramesh, R.

AU - Gopalan, Venkatraman

N1 - Funding Information: We acknowledge funding from the National Science Foundation under Grant Nos. DMR-0512165, DMR-0507146, DMR-0213623, and DMR-0602986.

PY - 2008

Y1 - 2008

N2 - A prominent band centered at ∼1000-1300 cm-1 and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFe O3 thin films and single crystals. A strong anomaly in this band occurs at the antiferromagnetic Neel temperature, TN ∼375 °C. This band is composed of three peaks, assigned to 2 A4, 2 E8, and 2 E9 Raman modes. While all three peaks were found to be sensitive to the antiferromagnetic phase transition, the 2 E8 mode, in particular, nearly disappears at TN on heating, indicating a strong spin-two-phonon coupling in BiFe O3.

AB - A prominent band centered at ∼1000-1300 cm-1 and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFe O3 thin films and single crystals. A strong anomaly in this band occurs at the antiferromagnetic Neel temperature, TN ∼375 °C. This band is composed of three peaks, assigned to 2 A4, 2 E8, and 2 E9 Raman modes. While all three peaks were found to be sensitive to the antiferromagnetic phase transition, the 2 E8 mode, in particular, nearly disappears at TN on heating, indicating a strong spin-two-phonon coupling in BiFe O3.

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DO - 10.1063/1.2829681

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 022511

ER -

Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO₃

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