Multiferroic nature of charge-ordered rare earth manganites

Charge-ordered rare earth manganites Nd0.5Ca0.5MnO3,La0.25Nd0.25Ca0.5MnO3, Pr0.7Ca0.3MnO3 and Pr0.6Ca0.4MnO3 are found to exhibit dielectric constant anomalies around the charge-ordering or the antiferromagnetic transition temperatures. Magnetic fields have a marked effect on the dielectric properti...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2007-12, Vol.19 (49), p.496217-496217 (5)
Main Authors: Serrao, Claudy Rayan, Sundaresan, A, Rao, C N R
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetomechanical and magnetoelectric effects, magnetostriction
Magnetotransport phenomena, materials for magnetotransport
Manganites
Physics
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Summary:Charge-ordered rare earth manganites Nd0.5Ca0.5MnO3,La0.25Nd0.25Ca0.5MnO3, Pr0.7Ca0.3MnO3 and Pr0.6Ca0.4MnO3 are found to exhibit dielectric constant anomalies around the charge-ordering or the antiferromagnetic transition temperatures. Magnetic fields have a marked effect on the dielectric properties, indicating the presence of coupling between the magnetic and electrical order parameters. The observation of magnetoferroelectricity in these manganites is in accord with the recent theoretical predictions of Khomskii and co-workers.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/19/49/496217