Here, we report on the observation of a weak ferromagnetic transition at in a system which is ferroelectric and ferroelastic below . The magnetization and the susceptibility continuously increase with decreasing down to . The Mössbauer spectra show a spontaneous magnetic ordering and at least three sites corresponding to and . The ratio between and is 60:40. At , there are two magnetically ordered sextets with internal fields of 585 and . The “slim” hysteresis loops observed are as well characteristic of weak ferromagnetism. At and at low frequencies, the system shows dielectric anomaly characteristic of magnetoelectric behavior.
REFERENCES
1.
J.
Ravez
, S. C.
Abrahams
, and R.
de Pape
, J. Appl. Phys.
65
, 3987
(1989
).2.
J.
Ravez
, J. Phys. III
7
, 1129
(1997
).3.
S.
Fabbrici
, E.
Montanari
, L.
Righi
, G.
Calestani
, and A.
Migliori
, Chem. Mater.
16
, 3007
(2004
).4.
Y.
Calage
, S. C.
Abrahams
, J.
Ravez
, and R.
de Pape
, J. Appl. Phys.
67
, 430
(1990
).5.
S. C.
Abrahams
, Acta Crystallogr., Sect. B: Struct. Sci.
45
, 228
(1989
).6.
A. M.
Hardy
, A.
Hardy
, and G.
Ferey
, Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem.
B29
, 1654
(1973
).7.
8.
A.
Levstik
, V.
Bobnar
, C.
Filipič
, J.
Holc
, M.
Kosec
, R.
Blinc
, Z.
Trontelj
, and Z.
Jagličić
, Appl. Phys. Lett.
91
, 012905
(2007
).9.
I.
Dzialoshinski
, J. Phys. Chem. Solids
4
, 241
(1958
).10.
T.
Moriya
, Phys. Rev.
120
, 91
(1960
).11.
I. A.
Sergienko
and E.
Dagotto
, Phys. Rev. B
73
, 094434
(2006
).12.
A. M.
Glass
, M. E.
Lines
, M.
Eibschutz
, F. S. L.
Fu
, and H. J.
Guggenheim
, Commun. Phys. (London)
2
, 103
(1977
).13.
J. F.
Scott
, Phys. Rev. B
16
, 2329
(1977
).14.
G.
Catalan
, Appl. Phys. Lett.
88
, 102902
(2006
).15.
N.
Ortega
, A.
Kumar
, R. S.
Katiyar
, and J. F.
Scott
, Appl. Phys. Lett.
91
, 102902
(2007
).16.
G.
Catalan
and J. F.
Scott
, Nature (London)
448
, E4
(2007
).© 2008 American Institute of Physics.
2008
American Institute of Physics
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