Structure and magnetic properties of intermetallic compounds Gd_5Si_(2-x) Ge_(2-x)M_(2x)

The effects of substituting stable elements of M(M=Mn, Mo, Al, V) for nonmagnetic Si and Ge on the structure and magnetic properties of Gd5Si2Ge2 were investigated by means of X-ray powder diffraction and magnetic measurements. The experimental results show that there is no effect on the structure of parent phase Gd5Si2Ge2compound when being substituted by small amount of stable elements. The measurements of magnetic properties show that the Curie temperatures of Gd5Si2- Ge2- M x x 2x (M=Mn, Mo, Al and V) compounds have no obvious change before annealing, but they increase obviously with x increasing after annealing. Annealing can affect the crystalline microstructure and surface microstructure of the alloy after substitution.

The effects of substituting stable elements of M（M=Mn, Mo, Al, V） for nonmagnetic Si and Ge on the structure and magnetic properties of Gd5Si2Ge2 were investigated by means of X-ray powder diffraction and magnetic measurements. The experimental results show that there is no effect on the structure of parent phase Gd5Si2Ge2 compound when being substituted by small amount of stable elements. The measurements of magnetic properties show that the Curie temperatures of Gd5Si2-xGe2-xM2x （M=Mn, Mo, Al and V） compounds have no obvious change before annealing, but they increase obviously with x increasing after annealing. Annealing can affect the crystalline microstructure and surface microstructure of the alloy after substitution.