Order parameters and phase diagram of multiferroic RMn2O5

The generic magnetic phase diagram of multiferroic RMn2O5 (with R=Y, Ho, Tb, Er, Tm), which allows different sequences of ordered magnetic structures for different R's and different control parameters, is described using order parameters which explicitly incorporate the magnetic symmetry. A phe...

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Bibliographic Details
Published in:Physical review letters 2008-05, Vol.100 (21), p.217202-217202
Main Authors: Harris, A B, Aharony, Amnon, Entin-Wohlman, Ora
Format: Article
Language:English
Online Access:Get full text
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Summary:The generic magnetic phase diagram of multiferroic RMn2O5 (with R=Y, Ho, Tb, Er, Tm), which allows different sequences of ordered magnetic structures for different R's and different control parameters, is described using order parameters which explicitly incorporate the magnetic symmetry. A phenomenological magnetoelectric coupling is used to explain why some of these magnetic phases are also ferroelectric. Several new experiments, which can test this theory, are proposed.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.100.217202