Continuous first-order orbital order-disorder transition in Nd(1-x)Ca(x)MnO(3)

C.V. Colin, A.J.C. Buurma, M. v. Zimmermann, T.T.M. Palstra

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    Abstract

    The nature of the cooperative Jahn-Teller (JT) transition accompanied by orbital order-disorder in Nd(1-x)Ca(x)MnO(3) has been studied by high temperature (300-1200 K) synchrotron and laboratory x-ray powder diffraction in the low doping region (0≤x≤0.1). For very low doping a large temperature range of phase coexistence associated with a first-order transition has been observed, resembling a martensitic transformation. The transition appears continuous because of a gradual evolution of the volume fractions of the phases over a broad temperature interval. The first-order nature of the transition and the phase coexistence is suppressed with increasing doping.
    Original languageEnglish
    Article number434223
    Number of pages7
    JournalJournal of physics: Condensed matter
    Volume20
    DOIs
    Publication statusPublished - 29 Oct 2008

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