Magnetization behaviour of xEu2O3(1−x)Na2B4O7 glasses

Glasses of the xEu2O3(1−x)Na2B4O7 system with 0.05⩽x⩽0.30 were studied by magnetization measurements. Their magnetic behaviour is due to the presence of europium ions in both 2+ and 3+ valence states. Low-temperature (4 K) magnetization data showed the presence of a magnetically ordered phase due to the Eu2+ ions and permitted an estimation of their amount.