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dc.contributor.authorMandal, P-
dc.contributor.authorBhadram, Venkata Srinu-
dc.contributor.authorSundarayya, Y-
dc.contributor.authorNarayana, Chandrabhas-
dc.contributor.authorSundaresan, A-
dc.contributor.authorRao, C N R-
dc.identifier.citationPhysical Review Letters 107(13), 137202-1-5 (2011)en_US
dc.description.abstractWe report the observation of magnetoelectric and magnetodielectric effects at different temperatures in Mn-substituted yttrium orthoferrite, YFe(1-x)Mn(x)O(3)(0.1 <= x <= 0.40). Substitution of Mn in antiferromagnetic YFeO(3)(T(N) = 640 K) induces a first-order spin-reorientation transition at a temperature, T(SR), which increases with x whereas the Neel temperature (T(N)) decreases. While the magnetodielectric effect occurs at T(SR) and T(N), the ferroelectricity appears rather at low temperatures. The origin of magnetodielectric effect is attributed to spin-phonon coupling as evidenced from the temperature dependence of Raman phonon modes. The large magnetocapacitance (18% at 50 kOe) near T(SR) = 320 K and high ferroelectric transition temperature (similar to 115 K) observed for x = 0.4 suggest routes to enhance magnetoelectric effect near room temperature for practical applications.en_US
dc.publisherAmerican Physical Societyen_US
dc.rights© 2011 American Physical Societyen_US
dc.subjectRaman Spectroscopyen_US
dc.titleSpin-Reorientation, Ferroelectricity, and Magnetodielectric Effect in YFe(1-x)Mn(x)O(3)(0.1 <= x <= 0.40)en_US
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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