TY - JOUR
T1 - Double-layered Aurivillius-type ferroelectrics with magnetic moments
AU - Missyul, A.B.
AU - Zvereva, I.A.
AU - Palstra, Thom T.M.
AU - Kurbakov, A.I.
PY - 2010/5
Y1 - 2010/5
N2 - We have synthesized the double-layer Aurivillius phase Bi2LnNbTiO9 where Ln = Nd–Gd, Bi. All compounds adopt the orthorhombic polar space group A21am. The magnetic Ln-ion occupies the cuboctahedral position in the middle of the perovskite double-layer, and thus controls the octahedral tilt of the perovskite block. This tilt modifies the ferroelectric displacement of the (Nb,Ti) towards the octahedral faces. This provides a mechanism to systematically modify the polarization. Mn-substitution on the (Nb,Ti) site for Ln = Bi is homogeneous up to x = 0.2. The magnetic moments of Ln do not order down to 5 K.
AB - We have synthesized the double-layer Aurivillius phase Bi2LnNbTiO9 where Ln = Nd–Gd, Bi. All compounds adopt the orthorhombic polar space group A21am. The magnetic Ln-ion occupies the cuboctahedral position in the middle of the perovskite double-layer, and thus controls the octahedral tilt of the perovskite block. This tilt modifies the ferroelectric displacement of the (Nb,Ti) towards the octahedral faces. This provides a mechanism to systematically modify the polarization. Mn-substitution on the (Nb,Ti) site for Ln = Bi is homogeneous up to x = 0.2. The magnetic moments of Ln do not order down to 5 K.
U2 - 10.1016/j.materresbull.2010.02.002
DO - 10.1016/j.materresbull.2010.02.002
M3 - Article
VL - 45
SP - 546
EP - 550
JO - Materials research bulletin
JF - Materials research bulletin
SN - 0025-5408
IS - 5
ER -