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Electrical resistivity of 5 f -electron systems affected by static and dynamic spin disorder

2017; American Physical Society; Volume: 95; Issue: 23 Linguagem: Inglês

10.1103/physrevb.95.235112

2469-9977

L. Havela, M. Paukov, Volodymyr Buturlim, I. Tkach, Daria Drozdenko, Miroslav Cieslar, S. Mašková, Milan Dopita, Zdeněk Matěj,

Nuclear Materials and Properties

Metallic $5f$ materials have very strong coupling of magnetic moments and electrons mediating electrical conduction. It is caused by strong spin-orbit interaction, coming with high atomic number $Z$, together with involvement of the $5f$ states in metallic bonding. We have used the recently discovered class of uranium (ultra)nanocrystalline hydrides, which are ferromagnets with high ordering temperature, to disentangle the origin of negative temperature coefficient of electrical resistivity. In general, the phenomenon of electrical resistivity decreasing with increasing temperature in metals can have several reasons. The magnetoresistivity study of these hydrides reveals that quantum effects related to spin-disorder scattering can explain the resistivity behavior of a broad class of actinide compounds.