A prominent band centered at 10001300cm1 and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFeO3 thin films and single crystals. A strong anomaly in this band occurs at the antiferromagnetic Neel temperature, TN375°C. This band is composed of three peaks, assigned to 2A4, 2E8, and 2E9 Raman modes. While all three peaks were found to be sensitive to the antiferromagnetic phase transition, the 2E8 mode, in particular, nearly disappears at TN on heating, indicating a strong spin-two-phonon coupling in BiFeO3.

1.
T.
Kimura
,
T.
Goto
,
H.
Shintani
,
K.
Ishizaka
,
T.
Arima
, and
Y.
Tokura
,
Nature (London)
426
,
55
(
2003
).
2.
N.
Hur
,
S.
Park
,
P. A.
Sharma
,
J. S.
Ahn
,
S.
Guha
, and
S. W.
Cheong
,
Nature (London)
429
,
392
(
2004
).
3.
N. A.
Spaldin
and
M.
Fiebig
,
Science
309
,
391
(
2005
).
4.
W.
Erenstein
,
N. D.
Mathur
, and
J. F.
Scott
,
Nature (London)
442
,
759
(
2006
).
5.
M.
Fiebig
,
Th.
Lottermoser
,
D.
Frohlich
,
A. V.
Goltsev
, and
R. V.
Pisarev
,
Nature (London)
419
,
818
(
2002
).
6.
F.
Kubel
and
H.
Schmid
,
Acta Crystallogr., Sect. B: Struct. Sci.
46
,
698
(
1990
).
7.
P.
Fischer
,
M.
Polomska
,
I.
Sosnowska
, and
M.
Szymanski
,
J. Phys. C
13
,
1931
(
1980
).
8.
M.
Fiebig
,
V. V.
Palov
, and
R. V.
Pissarev
,
J. Opt. Soc. Am. B
22
,
96
(
2005
).
9.
A.
Palewicz
,
R.
Przenioslo
,
I.
Sosnowska
, and
A. W.
Hewat
,
Acta Crystallogr., Sect. B: Struct. Sci.
63
,
537
(
2007
).
10.
A. M.
Agaltsov
,
V. S.
Gorelik
,
A. K.
Zvezdin
,
V. A.
Murashov
, and
D. N.
Rakov
,
Sov. Phys. Short Commun.
5
,
37
(
1989
).
11.
M. S.
Kartavtseva
,
O. Yu.
Gorbenko
,
A. R.
Kaul
,
T. V.
Murzina
,
S. A.
Savinov
, and
O. A.
Aktsipetrov
,
J. Mater. Res.
22
,
2063
(
2007
).
12.
R.
Haumont
,
J.
Kreisel
,
P.
Bouvier
, and
F.
Hippert
,
Phys. Rev. B
73
,
132101
(
2006
).
13.
R.
Haumont
,
J.
Kreisel
, and
P.
Bouvier
,
Phase Transitions
79
,
1043
(
2006
).
14.
T.
Zhao
,
A.
Scholl
,
F.
Zavaliche
,
K.
Lee
,
M.
Barry
,
A.
Doran
,
M. P.
Cruz
,
Y. H.
Chu
,
C.
Ederer
,
N. A.
Spaldin
,
R. R.
Das
,
D. M.
Kim
,
S. H.
Baek
,
C. B.
Eom
, and
R.
Ramesh
,
Nat. Mater.
5
,
823
(
2006
).
15.
G. L.
Yuan
,
S. W.
Or
, and
H. L.
Wa Chan
,
J. Appl. Phys.
101
,
064101
(
2007
).
16.
M. K.
Singh
,
H. M.
Jang
,
S.
Ryu
, and
M.
Jo
,
Appl. Phys. Lett.
88
,
042907
(
2006
).
17.
M. K.
Singh
,
S.
Ryu
, and
H. M.
Jang
,
Phys. Rev. B
72
,
132101
(
2005
).
18.
P.
Hermet
,
M.
Goffinet
,
J.
Kreisel
, and
Ph.
Ghosez
,
Phys. Rev. B
75
,
220102
(
2007
).
19.
H.
Fukumura
,
H.
Harima
,
K.
Kisoda
,
M.
Tamada
,
Y.
Noguchi
, and
M.
Miyayama
,
J. Magn. Magn. Mater.
310
,
e367
(
2007
).
20.
S.
Kamba
,
D.
Nuzhnyy
,
M.
Savinov
,
J.
Sebek
,
J.
Petzelt
,
J.
Prokleska
,
R.
Haumont
, and
J.
Kreisel
,
Phys. Rev. B
75
,
024403
(
2007
).
21.
K. F.
McCarty
,
Solid State Commun.
68
,
799
(
1988
).
22.
T. P.
Martin
,
R.
Merlin
,
D. R.
Huffman
, and
M.
Cardona
,
Solid State Commun.
22
,
565
(
1977
).
23.
M. J.
Massey
,
U.
Baier
,
R.
Merlin
, and
W. H.
Weber
,
Phys. Rev. B
41
,
7822
(
1990
).
24.
C.
Ederer
and
N. A.
Spaldin
,
Phys. Rev. B
71
,
060401
(
2005
).
25.
M.
Cazayous
,
D.
Malka
,
D.
Lebeugle
, and
D.
Colson
,
Appl. Phys. Lett.
91
,
071910
(
2007
).
26.
C.
Fennie
and
C.
Ederer
(private communication).
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