Structural and magnetic behavior of some borate glasses containing europium ions

Glasses of the xEu2O3(1−x)Na2B4O7 system with 0.01≤x≤0.30 were studied by IR spectroscopic, density and magnetic measurements. IR and density data evidenced the network modifier role played by the europium ions in the studied glasses. Low temperature (4 K) magnetization data showed the presence of a magnetic ordered phase due to the Eu2+ ions and permitted to estimate their amount.