The heat capacity of (U1− y Np y )O2 solid solutions: The effect of Np substitution on the first-order transition at low concentration (y ≤ 0.05)
The low-temperature heat capacity of neptunium-doped UO2 samples were measured by low-temperature relaxation calorimetry. A strong effect was observed on the antiferromagnetic anomaly, both the Nèel temperature and transition entropy. By comparison to data for other (U1−y,My)O2 solid solutions, it is suggested that this effect can be explained by lattice strain resulting from substitution on the anion sublattice, and electron spin interaction.
KONINGS R. J. M.;
COLINEAU Eric;
GRIVEAU Jean-Christophe;
POPA Karin;
VĂLU Sorin Octavian;
2026-03-05
PERGAMON-ELSEVIER SCIENCE LTD
JRC143877
1879-2553 (online),
https://www.sciencedirect.com/science/article/pii/S0022369726001095,
https://publications.jrc.ec.europa.eu/repository/handle/JRC143877,
10.1016/j.jpcs.2026.113623 (online),
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