Neutron diffraction, x-ray diffraction, and specific heat studies of orbital ordering in YVO3

G. R. Blake, T. T M Palstra, Y. Ren, A. A. Nugroho, A. A. Menovsky

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93 Citations (Scopus)

Abstract

Neutron diffraction, synchrotron x-ray diffraction, and specific heat studies have been carried out to investigate the nature of the ordered occupation of the vanadium d orbitals in perovskite YVO3. Evidence has been found for a change in the type of orbital ordering at the 77-K phase transition in this material, manifested by a change in the type of Jahn-Teller distortion. This transition between orbital orderings is caused by an increase in octahedral tilting with decreasing temperature. The orbital ordering above 77 K is not destroyed at the magnetic ordering temperature of 116 K, but is present as far as a second structural phase transition at 200 K. The entropy changes at the onset of both spin and orbital ordering are much lower than the smallest semiclassical value of Rln2 J/(mole K).

Original languageEnglish
Article number174112
Pages (from-to)1741121-1741129
Number of pages9
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume65
Issue number17
DOIs
Publication statusPublished - 1 May 2002
Externally publishedYes

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