Abstract
Solid solutions Mg y U 1− y O 2+ x with fluorite structure were prepared and their magnetic susceptibilities were measured from 4.2 K to room temperature. An antiferromagnetic transition was observed for the solid solutions examined in this study. Both the Néel temperature and the effective magnetic moment of uranium decreased with increasing magnesium concentration. The change in the magnetic properties of these solid solutions with x and y values was compared with that of M y U 1− y O 2+ x solid solutions where M = Ca 2+, Y 3+, La 3+, or Th 4+. The substitution of Mg 2+ for U 4+ was found to oxidize uranium ions to the +5 state but not to the +6 state. The variation of the effective magnetic moment of uranium against mean uranium valency is quite similar to that for the solid solutions with M = Ca 2+, Y 3+, or La 3+.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
