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Magnetic susceptibilities of UO/sub 2/-ThO/sub 2/-ZrO/sub 2/ solid solutions

Journal Article · · J. Solid State Chem.; (United States)
Magnetic susceptibilities were measured from 2.2 K to room temperature for solid solutions of UO/sub 2/-ThO/sub 2/-ZrO/sub 2/ of which the lattice parameters are the same as that of UO/sub 2/, i.e., Th/sub 0.7y/Zr/sub 0.3y/U/sub 1-y/O/sub 2/ solid solutions. The Neel temperature decreases linearly with decreasing uranium concentration, the critical concentration being 69 mole% UO/sub 2/. The Neel temperatures of the present solid solutions are nearly in the middle of UO/sub 2/-ThO/sub 2/ solid solutions and UO/sub 2/-ZrO/sub 2/ solid solutions, which indicates that the magnetic dilution effect of ZrO/sub 2/ is larger than that of ThO/sub 2/. The effective magnetic moment decreases with decreasing uranium concentration, which is due to a decrease in the magnetic interactions with adjacent uranium ions, not due to a change of the strength of crystalline field. The Weiss constant decreases almost linearly with decreasing uranium concentration.
Research Organization:
Japan Atomic Energy Research Institute, Tokai-mura
OSTI ID:
5428309
Journal Information:
J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 63:2; ISSN JSSCB
Country of Publication:
United States
Language:
English