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- W4308736430 abstract "The low-temperature heat capacity of lanthanide-doped (La, Nd) and americium-doped UO2 samples was measured by calorimetry. The results showed a strong effect on the antiferromagnetic Cp anomaly as a result of crystal lattice substitution, defects resulting from self-irradiation, and electron interaction. It was found that the substitution of trivalent ions (La3+, Nd3+, Am3+) leads to a split of the λ peak, for which we hypothesize that the clustering of the trivalent ions with the charge compensator pentavalent U5+ can play a role. The overall behavior is confirmed by magnetization measurements using SQUID. The observed differences between La3+, Nd3+, and Am3+ are attributed to the f–f exchange interaction. 241Am decay causes in addition self-irradiation effects (point defects), and reduces Néel temperature, peak intensity, and magnetic entropy as a function of decay (accumulated α dose). The observed effects are similar to 238Pu-doped UO2, the slight differences being attributed to a higher degree of disorder in the Am material." @default.
- W4308736430 created "2022-11-15" @default.
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- W4308736430 date "2022-11-09" @default.
- W4308736430 modified "2023-09-25" @default.
- W4308736430 title "Low-temperature heat capacity and magnetism in (U1−<i>y</i>Ln<i>y</i>)O2 and (U1−<i>y</i>Am<i>y</i>)O2 (<i>y</i> = 0.01 − 0.05) solid solutions: Effects of substitution and self-irradiation" @default.
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- W4308736430 doi "https://doi.org/10.1063/5.0112674" @default.
- W4308736430 hasPublicationYear "2022" @default.
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