The effect of La and Sn doping on the structural and magnetic properties of RuSr2EuCeCu2Oz

초록

The crystal structure and magnetic properties of (Ru1-xSnx)Sr2EuCeCu2Oz and Ru(Sr2-xLax)EuCeCu2Oz ( 0 <= x <= 0.1) samples have been investigated to shed light on the doping-induced changes in the magnetic properties of Ru-1222 system. We show that La substitution for Sr leads to an increase in the temperature where the ferromagnetic component is observed and a moderate suppression of the ferromagnetic component whereas Sn substitution for Ru results in a significant decrease of the volume fraction of the ferromagnetic phase as well as a decrease in the magnetic ordering temperature. The experimental results are discussed in connection with the structural data studied by Rietveld refinement of the x-ray diffraction data.

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