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We report measurements of 57Fe Mossbauer spectra for RFe2Zn20 ( R = Lu, Yb,Gd) from ~ 4.5 K to room temperature. The obtained isomer shift values are verysimilar for all three compounds, their temperature dependence was analyzedwithin the Debye model and resulted in an estimate of the Debye temperatures of450-500 K. The values of quadrupole splitting at room temperature change withthe cubic lattice constant a in a linear fashion. For GdFe2Zn20, ferromagneticorder is seen as an appearance of a sextet in the spectra. The 57Fe sitehyperfine field for T = 0 was evaluated to be ~ 2.4 T.

Study of 57Fe Mossbauer effect in RFe2Zn20 ( R = Lu, Yb, Gd)