Effect of ionic size on the orbital ordering transition in RMnO 3 + δ

G. Maris, V. Volotchaev, T. T M Palstra*

*Corresponding author for this work

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30 Citations (Scopus)
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Abstract

We present high-temperature powder x-ray diffraction data of the orbital-order-induced structural distortion of RMnO3, with R a rare earth element. The associated phase transition takes place in a temperature interval of ≈200 K in which the orbitally ordered phase and the orbitally disordered phase coexist. We analyse the evolution of the RMnO3 perovskite structure with the size of the rare-earth ion and with temperature. We show that the rotation of the MnO6 octahedra stabilizes the cooperative Jahn-Teller distortion to higher temperature.

Original languageEnglish
Article number153
Number of pages11
JournalNew journal of physics
Volume6
DOIs
Publication statusPublished - 5 Nov 2004
Externally publishedYes

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