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Due to the similarity to BaFe2As2 and SrFe2As2 the RFe2Si2 (R=La, Y and Lu)system has been proposed as a potential candidate for a new superconductingfamily containing Fe-Si layers as a structural unit. Various R(Fe1-xMx)2Si2M=Ni, Mn and Cu) materials were synthesized and measured for their magneticproperties. None of these materials is superconducting down to 5 K. Fe inRFe2Si2 is paramagnetic. A pronounced peak at 232 K was observed in themagnetization curve of YFe2Si2. 57Fe M\"ossbauer studies confirm the absence ofany magnetic ordering at low temperatures. Similar peaks at varioustemperatures also appear in R(Fe1-xMx)2Si2 samples. Four independent factorsaffect the peak position and shift it to lower temperatures: (i) the latticeparameters, (ii) the concentration of x, (iii) the applied magnetic field, and(iv) the magnetic nature of M. The peak position is dramatically affected bythe magnetic Mn dopants. It is propose that the magnetic peaks observed inRFe2Si2 and in R(Fe1-xMx)2Si2 represent a new nearly ferromagnetic Fermi liquid(NFFL) system and their nature is yet to be determined.

Magnetic Properties of RFe2Si2 and R(Fe1-xMx)2Si2 Systems (R=La, Y and Lu, M= Ni, Mn and Cu)