Raman scattering from phonons inYNi2B2C

We report polarized micro-Raman spectra of ${\mathrm{YNi}}_2$ ${\mathrm{B}}_2$C at room temperature. The sample used in the Raman experiment was well characterized by x-ray powder diffraction and ac magnetic susceptibility measurements (${\mathit{T}}_{\mathit{c}}$≊14.5 K). For ${\mathrm{YNi}}_2$ ${\mathrm{B}}_2$C, there are only four Raman phonons allowed by symmetry and we have identified them at 198 ${\mathrm{cm}}^{\mathrm{-}1}$ (Ni-${\mathit{B}}_{1\mathit{g}}$), 282 ${\mathrm{cm}}^{\mathrm{-}1}$ (Ni-${\mathit{E}}_{\mathit{g}}$), 470 ${\mathrm{cm}}^{\mathrm{-}1}$ (B-${\mathit{E}}_{\mathit{g}}$), and 832 ${\mathrm{cm}}^{\mathrm{-}1}$ (B-${\mathit{A}}_{1\mathit{g}}$).