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

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

125 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

Cite this

@article{a659ca64535c4f6c834f93a9d58595fc,

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",

number = "2",

}

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.

UR - https://www.scopus.com/pages/publications/38349159261

UR - https://www.scopus.com/pages/publications/38349159261#tab=citedBy

U2 - 10.1063/1.2829681

DO - 10.1063/1.2829681

M3 - Article

AN - SCOPUS:38349159261

SN - 0003-6951

VL - 92

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 022511

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

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