Structural and magnetic properties of V1-tTitAs

Abstract

The pseudo-binary V1-tTitAs phase was investigated by X-ray diffraction, differential scanning calorimetry and magnetic susceptibility measurements. For slowly cooled samples, examined at room temperature, the MnP type structure prevails from t = 0.00 to 0.23 ± 0.03 and from t = 0.37 ± 0.03 to 0.495 ± 0.005, the NiAs type from t = 0.495 ± 0.005 to 0.77 ± 0.02 and the TiP type from t = 0.97 ± 0.02 to 1.00. Non-equilibrium conditions (probably originating from a tendency to ordering of the V and Ti atoms within the metal sublattice) rule the interval 0.23 ± 0.03 < 0.37 ± 0.03, whereas the interval 0.77 ± 0.02 < t < 0.97 ± 0.02 represents a two phase region. A first order MnP to NiAs type transition was observed for 0.40 < t < 0.50. V1-tTitAs belongs to the gross category of Pauli paramagnetic materials.