Abstract：
:The low-temperature heat capacity of (U1-yThy)O2 and 238Pu-doped UO2 samples were determined using hybrid adiabatic relaxation calorimetry. Results of the investigated systems revealed the presence of the magnetic transition specific for UO2 in all three intermediate compositions of the uranium-thorium dioxide (y = 0.05, 0.09 and 0.12) and in the 238Pu-doped UO2 around 25 K. The magnetic behaviour of UO2 exposed to the high alpha dose from the 238Pu isotope was studied over time and it was found that 1.6% 238Pu affects the magnetic transition substantially, even after short period of time after annealing. In both systems the antiferromagnetic transition changes intensity, shape and Néel temperature with increasing Th-content and radiation dose, respectively, related to the increasing disorder on the crystal lattice resulting from substitution and defect creation.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Vălu SO,De Bona E,Popa K,Griveau JC,Colineau E,Konings RJMdoi
10.1038/s41598-019-51476-3subject
Has Abstractpub_date
2019-10-21 00:00:00pages
15082issue
1issn
2045-2322pii
10.1038/s41598-019-51476-3journal_volume
9pub_type
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