Physical properties of TlFe3Te3 near its first order transition

Pseudo-one-dimensional Chevrel compound TlFe3Te3 undergoes a first-order phase transition from paramagnetic to ferromagnetic at TC = 220 K. Here we report a systematic study of magnetization, heat capacity and resistivity on polycrystalline TlFe3Te3 near TC. The enhancements of TC in an external magnetic field and a hydrostatic pressure follow the Clausius-Clapeyron relations. The large enhancement of the TC under the pressure indicates that the unit cell shrinks from para- to ferro-magnetic phase.