Investigation of phase formation of RFe11V1 − xTix (R = Pr, Ce) compounds

Abstract

Phase formation of PrFe11V1 − xTix and CeFe11V1 − xTix compounds with the ThMn12-type structure has been investigated by x-ray diffraction (XRD), differential thermal analysis (DTA) and ac initial susceptibility. The stable temperature range of the 1-12 phase for PrFe11V1 − xTix alloys has been constructed as a function of Ti content. It is found that the PrFe11V compound with the ThMn12-type structure do not form. The PrFe11Ti compound with the ThMn12-type structure can only be obtained by annealing at a narrow temperature range between 1030 °C and 1113 °C. Furthermore, 1-12 phase can be obtained at lower temperature and wider temperature range with decreasing Ti content x(0.2 ≤ x ≤ 1). The CeFe11V and CeFe11Ti compound with ThMn12-type structure can be synthesized, and it is more favorable to synthesis the 1-12 single phase for the pseudotenary CeFe11V1 − xTix compounds. For PrFe11V1 − xTix compounds with x = 0.2–1, the lattice parameters a and c do not vary very much: around 0.860 and 0.479 nm, and Curie temperature Tc is 268 °C–329 °C. For CeFe11V1 − xTix compounds the lattice parameters a and c are around 0.857 and 0.478 nm, and Curie temperature Tc is 211 °C–252 °C.