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Interplay between charge, orbital and magnetic order in Pr_{1-x}Ca_xMnO_3

M. v. Zimmermann·J. P. Hill·Doon Gibbs·M. Blume·D. Casa·B. Keimer·Y. Murakami·Y. Tomioka·Y. Tokura
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Abstract

We report resonant x-ray scattering studies of charge and orbital order in Pr_{1-x}Ca_{x}MnO_3 with x=0.4 and 0.5. Below the ordering temperature, T_O=245 K, the charge and orbital order intensities follow the same temperature dependence, including an increase at the antiferromagnetic ordering temperature, T_N. High resolution measurements reveal, however, that long range orbital order is never achieved. Rather, an orbital domain state is formed. Above T_O, the charge order fluctuations are more highly correlated than the orbital fluctuations. Similar phenomenology is observed in a magnetic field. We conclude that the charge order drives the orbital order at the transition.

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M. v. Zimmermann, J. P. Hill, Doon Gibbs, M. Blume, D. Casa, B. Keimer, Y. Murakami, Y. Tomioka, Y. Tokura. 1999-05-19. Interplay between charge, orbital and magnetic order in Pr_{1-x}Ca_xMnO_3. https://doi.org/10.1103/physrevlett.83.4872

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