TY - JOUR
T1 - Influence of magnetic on ferroelectric ordering in LuMnO3
AU - Van Aken, Bas B.
AU - Palstra, Thomas T.M.
PY - 2004/4/1
Y1 - 2004/4/1
N2 - We have studied the influence of antiferromagnetic ordering on the local dielectric moments of the MnO5 and LuO7 polyhedra by measuring neutron powder-diffraction patterns of LuMnO3 at temperatures near TN. We show that the coupling is weak, because the magnetic exchange coupling is predominantly in the ab plane of the MnO5 trigonal bipyramids, and the electric dipole moments, originating in the LuO7 polyhedra, are oriented along the hexagonal c axis. Anomalies in the dielectric properties near TN are thus caused by the geometric constraints between the MnO5 and the LuO7 polyhedra.
AB - We have studied the influence of antiferromagnetic ordering on the local dielectric moments of the MnO5 and LuO7 polyhedra by measuring neutron powder-diffraction patterns of LuMnO3 at temperatures near TN. We show that the coupling is weak, because the magnetic exchange coupling is predominantly in the ab plane of the MnO5 trigonal bipyramids, and the electric dipole moments, originating in the LuO7 polyhedra, are oriented along the hexagonal c axis. Anomalies in the dielectric properties near TN are thus caused by the geometric constraints between the MnO5 and the LuO7 polyhedra.
UR - http://www.scopus.com/inward/record.url?scp=42749104870&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.69.134113
DO - 10.1103/PhysRevB.69.134113
M3 - Article
AN - SCOPUS:42749104870
VL - 69
JO - Physical review B: Covering condensed matter and materials physics
JF - Physical review B: Covering condensed matter and materials physics
SN - 2469-9950
IS - 13
M1 - 134113
ER -