New phase transition in $P{r}_{1-x}C{a}_{x}Mn{O}_3$ system: evidence for electrical polarization in charge ordered manganites

Abstract

A detailed study of the electric field gradient (EFG) across the Pr1-xCaxMnO3 phase diagram and its temperature dependence is given. Clearly, distinct EFG behaviours for samples outside/inside the charge order (CO) region are observed. The EFG temperature dependence evidences a new phase transition occurring over the broad CO region of the phase diagram. This transition is discontinuous and occurs at temperatures between the charge ordering and the Neel temperatures. The features observed in the EFG are associated with polar atomic vibrations which eventually lead to a spontaneous local electric polarization below CO transition.

8 pages, 4 figures

References in corpus (10)

• Complexity in Strongly Correlated Electronic Systems
• Multiferroics: different ways to combine magnetism and ferroelectricity
• Coexisting charge modulation and ferromagnetism produces long period phases in manganites: new example of electronic soft matter
• Origin of Colossal Dielectric Response of Pr(0.6)Ca(0.4)MnO(3)
• Weak charge-lattice coupling requires reinterpretation of stripes of charge order in La1-xCaxMnO3
• X-ray Resonant Scattering Studies of Orbital and Charge Ordering in Pr${}_{1-x}$Ca${}_x$MnO${}_3$
• Multiferroicity induced by dislocated spin-density waves
• Percolative phase transition on ferromagnetic insulator manganites: uncorrelated to correlated polaron clusters
• Solitonic Phase in Manganites
• Very weak electron-phonon coupling and strong strain coupling in manganites

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