4 papers
Condensation of a tetrahedra rigid-body libration mode in HoBaCo4O7 : the origin of phase transition at 355 K
A. I. Rykov, Y. Ueda, M. Isobe +6
Rietveld profiles, Moessbauer spectra and x-ray absorption fine structure (XAFS) were analyzed through the structural phase transition at Ts = 355 K in HoBaCo4O7. Excess of the oxy…
Infrared and Raman spectra of LiV2O5 single crystals
Z. V. Popovic, R. Gajic, M. J. Konstantinovic +5
The phonon dynamics of LiV2O5 single crystals is studied using infrared and Raman spectroscopy techniques. The infrared-active phonon frequencies and dielectric constants are obtai…
Raman Scattering from Magnetic Excitations in the Spin Ladder Compounds CaV2O5 and MgV2O5
M. J. Konstantinovic, Z. V. Popovic, M. Isobe +1
We present the Raman-scattering spectra of CaV2O5 and MgV2O5. The magnetic contribution in the Raman spectra of CaV2O5 is found in the form of a strong asymmetric line, centered at…
First evidence for charge ordering in NaVO from Raman spectroscopy
M. J. Konstantinovic, Z. V. Popovic, A. N. Vasil'ev +2
We argue on the basis of symmetry selection rules and Raman scattering spectra that NaVO undergoes a charge ordering phase transition at T=34 K. Such a transition is ch…