Multiferroic nature of charge-ordered rare earth manganites

Abstract

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 magnetic 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 coworkers.

References in corpus (6)

• Materials with Colossal Dielectric Constant: Do They Exist?
• Origin of Colossal Dielectric Response of Pr(0.6)Ca(0.4)MnO(3)
• Magnetodielectric consequences of phase separation in the colossal magnetoresistance manganite Pr0.7Ca0.3MnO3
• Electronic phase separation in the rare earth manganates, (La1-xLnx)0.7Ca0.3MnO3 (Ln = Nd, Gd and Y)
• Magnetic Field resulting from non-linear electrical transport in single crystals of charge-ordered Pr${}_{0.63}$ Ca${}_{0.37}$ MnO${}_3$}
• Current-induced phase control in charged-ordered Nd0.5Ca0.5MnO3 and Pr0.6Ca0.4MnO3 crystals

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• The Dielectric Response of La0.5Ca0.5-xSrxMnO3 (0.1 <= x <= 0.4) Manganites with Different Magnetic Ground States
• Multiferroicity in Li0.05Ti0.02Ni0.93O Above Room Temperature
• Local structural changes in paramagnetic and charge ordered phases of Sm0.2Pr0.3Sr0.5MnO3: An EXAFS Study