Using inelastic x-ray scattering we have investigated lattice vibrations in a geometric frustrated system CdCr2O4 that upon cooling undergoes a spin-Peierls phase transition at TN = 7:8K from a cubic and paramagnetic to a tetragonal and Nee'l state. Phonon modes measured around Brillouin zone boundaries show energy shifts when the transition occurs. Our analysis shows that the shifting can be understood as the ordinary effects of the lowering of the crystal symmetry.
- A spin-Peierls phase transition
- Frustrated system CdCrO
- Phonon dispersions
- Spin-lattice coupling
- Synchrotron inelastic x-ray scattering
ASJC Scopus subject areas
- Physics and Astronomy(all)