Influence of magnetic on ferroelectric ordering in LuMnO3

Bas B. Van Aken*, Thomas T.M. Palstra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

47 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number134113
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume69
Issue number13
DOIs
Publication statusPublished - 1 Apr 2004
Externally publishedYes

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