Magnetic properties of Pr1-xGdxMn2Ge2 compounds

Kilic A., Kervan S., Ozcan S., Gencer A.

JOURNAL OF ALLOYS AND COMPOUNDS, vol.370, pp.47-52, 2004 (SCI-Expanded) identifier identifier


The structure and magnetic properties of the Pr1-xGdxMn2Ge2 (0-0 less than or equal to x less than or equal to 1.0) compounds have been investigated by means of X-ray diffraction (XRD), differential scanning calorimetry (DSC) techniques and AC magnetic susceptibility measurements. All compounds crystallize in the ThCr2Si2-type structure with the space group I4/mmm. The lattice constants and the unit cell volume obey Vegard's law. Samples in this alloy system exhibit a crossover from ferromagnetic ordering for PrMn2Ge2 to antiferromagnetic ordering for GdMn2Ge2 as a function of Gd concentration x. At low temperatures, the rare earth sublattice also orders and reconfigures the ordering in the Mn sublattice. The results are summarized in the x-T magnetic phase diagram. (C) 2003 Elsevier B.V. All rights reserved.