Table of Contents
ISRN Condensed Matter Physics
Volume 2013, Article ID 497073, 43 pages
http://dx.doi.org/10.1155/2013/497073
Review Article

Hexagonal Manganites—(RMnO3): Class (I) Multiferroics with Strong Coupling of Magnetism and Ferroelectricity

Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204-5002, USA

Received 15 October 2012; Accepted 2 November 2012

Academic Editors: I. Galanakis, M. Higuchi, and V. Kochereshko

Copyright © 2013 Bernd Lorenz. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Hexagonal manganites belong to an exciting class of materials exhibiting strong interactions between a highly frustrated magnetic system, the ferroelectric polarization, and the lattice. The existence and mutual interaction of different magnetic ions (Mn and rare earth) results in complex magnetic phase diagrams and novel physical phenomena. A summary and discussion of the various properties, underlying physical mechanisms, the role of the rare earth ions, and the complex interactions in multiferroic hexagonal manganites, are presented in this paper.