Study of the magnon spectrum in $FeV_{2}O_{4}$ using inelastic light scattering*

The interplay between orbital, spin and lattice dynamics create a rich environment for the study of novel properties and phases. Transition metal oxides with a spinel structure, $AB_{2}O_{4}$ are excellent systems in which to explore the interplay among these dynamics: By substituting on the $A$ and $B$ sites with various elements, various phenomena and ground states can be explored. $FeV_{2}O_{4}$ is a special spinel with two orbital-active $A-$ and $B-$ site cations. This material exhibits interesting magnetic and structural phenomena, such as multiferroic behavior and a strong dependence of its physical properties on external stimuli such as pressure and magnetic field. In this talk, we present an inelastic light (Raman) scattering study of the temperature- and magnetic field-dependence of the magnon spectrum of $FeV_{2}O_{4}$. We compare these results to of the magnon spectrum of $MnV_{2}O_{4}$ in order to examine the role of A-site substitution on the spin dynamics.