Transport, magnetic, thermal and structural properties of the spinel compound CuTi₂S₄

We have studied the transport, magnetic, thermal and structural properties of spinel compound CuTi₂S₄ using a high-quality polycrystalline sample. CuTi₂S₄ shows simple metallic conductivity and the Pauli paramagnetism, and there is no structural phase transition down to 8.3 K. The magnetic susceptibility increases with decreasing temperature and begins to saturate below 50 K. The electronic specific heat coefficient and the Debye temperature are estimated to be 23.9 mJ(mol K ²) and 352 K, respectively. These physical properties of CuTi ₂S₄ are probably attributed to narrow bands and high density of states of Ti 3d bands.