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Hyperfine interactions in the heavy-fermion superconductor UBe$$_{13}$$; $$^9$$Be NMR studies

To, Hideki*; Tsugawa, Norihiko*; Sera, Masafumi*; Harima, Hisatomo*; Haga, Yoshinori  ; Onuki, Yoshichika

$$^9$$Be NMR measurements have been performed for a single crystal UBe$$_{13}$$ with $$T_{rm c}$$ = 0.86 K. For an applied field parallel to [001] direction, we have observed a well-split $$^9$$Be NMR line with the sharp line- width of 10 Oe, guaranteeing the high-quality of the single crystal from the microscopic viewpoint. We have also calculated the electric field gradient ($$^9$$ EFG) tensor at Be(II) site using the band-structure calculation based on an FLAPW-LDA method. The present results give direct evidence that the Be 2p orbital is responsible for conduction bands.



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Category:Physics, Multidisciplinary



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