Abstract
The low-temperature state of U( Pd 1−x Fe x) 2 Ge 2(x=0.01, 0.02) is transformed from simple anti-ferromagnetism AF ( x=0.02) with a propagation vector k =[0 0 1] to the modulated longitudinal spin density wave LSDW ( x=0.01) with k=[0 0 3 4 ] . ZF-μSR showed that in the sample with x=0.01 the magnetic moments of uranium atoms in two magnetically nonequivalent positions (0 0 0) and (0 0 1) have different temperature dependencies. The results are discussed in the model of a superposition of square and sine shape of modulation in comparison with neutron diffraction data. It is shown, that the observed temperature behavior of moments can be connected with the temperature variation of the initial phase of LSDW modulation.
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