Toroidal moments as indicator for magneto-electric coupling: the case of BiFeO3 versus FeTiO3

In this paper we present an analysis of the magnetic toroidal moment and its relation to the various structural modes in R3c-distorted perovskites with magnetic cations on either the perovskite A or B site. We evaluate the toroidal moment in the limit of localized magnetic moments and show that the...

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Bibliographic Details
Published inThe European physical journal. B, Condensed matter physics Vol. 71; no. 3; pp. 349 - 354
Main Author Ederer, C.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer-Verlag 01.10.2009
Subjects
Complex Systems
Condensed Matter Physics
Fluid- and Aerodynamics
Physics
Physics and Astronomy
Solid State Physics
Topical issue on Magnetoelectric Interaction Phenomena in Crystals
77.80.-e Ferroelectricity and antiferroelectricity
75.25.+z Spin arrangements in magnetically ordered materials
75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction
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Summary:In this paper we present an analysis of the magnetic toroidal moment and its relation to the various structural modes in R3c-distorted perovskites with magnetic cations on either the perovskite A or B site. We evaluate the toroidal moment in the limit of localized magnetic moments and show that the full magnetic symmetry can be taken into account by considering small induced magnetic moments on the oxygen sites. Our results give a transparent picture of the possible coupling between magnetization, electric polarization, and toroidal moment, thereby highlighting the different roles played by the various structural distortions in multiferroic BiFeO 3 and in the recently discussed isostructural material FeTiO 3 , which has been predicted to exhibit electric field-induced magnetization switching.
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/e2009-00274-4