Infrared phonon study of the S = 1 spinel oxide ZnV2O 4

Sunghoon Jung, Jaehoon Noh, Jooyun Kim, C. L. Zhang, S. W. Cheong, E. J. Choi

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We have obtained infrared phonon spectra of spinel structure vanadium oxide ZnV2O4 over the temperature range 10K<T<100K from reflectivity measurements. When the material undergoes the structural transition at Ts = 51K each of the four phonon peaks is split into a doublet (eight phonons) and additionally two new phonons appear at ω = 187 and 488cm-1. Point group analysis shows that such phonon change is consistent with the crystal symmetry I41/amd at T<Ts. We compare this result against recent theories about the orbital ordering mechanism in tetragonal ZnV2O4.

Original languageEnglish
Article number175205
JournalJournal of Physics Condensed Matter
Issue number17
StatePublished - 30 Apr 2008


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