Formation and magnetic properties of novel compounds Tb-3(Fe1-xVx)(29)

A systematic investigation of the structure and magnetic properties of novel compounds Tb-3(Fe1-xVx)(29) (x = 0.033, 0.044, 0.056, and 0.061) has been performed. The lattice parameters and Curie temperatures are obtained. The saturation magnetization of Tb-3(Fe1-xVx)(29) decreases but the anisotropy field increases linearly with increasing V concentration at 4.2 K and room temperature. The spin reorientations of the easy magnetization direction of Tb-3(Fe1-xVx)(29) occur at around 160 K. A first order magnetization process of Tb-3(Fe1-xVx)(29) is observed with magnetic field in the range between 2.0 and 1.6 T at room temperature. The saturation magnetization of Tb3Fe29-yVy with a low V concentration at 4.2 K can be roughly calculated based on a combination of that of the Tb2Fe17 and TbFe12-yVy units in a ratio of 1:1. (C) 1997 American Institute of Physics.