Symmetry analysis of the magnetic ordering in RFe4Al8 (R=La, Ce, Y, Lu and Tb) compounds (II)

Abstract Representation analysis of the neutron diffraction data of RFe 4 Al 8 (R=La, Ce, Y, Lu and Tb) tetragonal compounds (I4/mmm) for the wave vectors q 2 =(0 0 q z ), and q 3 =(q x , q x , 0) leads to a large variety of modulated structures and enables a systematic classification of the used models in the calculation of powder neutron diffraction patterns. All observed magnetic structures are obtained by combining two representations which corresponds to a further symmetry reduction. In the data analysis additional parameter constraints are inserted by applying some simple physical arguments.