14N Nuclear Magnetic Resonance and Relaxation in the Paramagnetic Region of Uranium Mononitride |
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| Authors: | V. V. Ogloblichev A. M. Potapov S. V. Verkhovskii A. V. Mirmelstein |
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| Affiliation: | 1.Institute of Metal Physics, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;2.Institute of High-Temperature Electrochemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;3.Russian Federal Nuclear Center VNIITF,Snezhinsk, Chelyabinsk region,Russia |
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| Abstract: | The spin susceptibility of a polycrystalline sample of uranium mononitride UN is studied by measuring the 14N NMR line shift, spin–lattice relaxation rates of the nuclear spin, and static magnetic susceptibility in the temperature region of 1.5TN < T < 7TN A joint analysis of the results obtained has revealed the temperature dependence of the characteristic energy of spin fluctuations of the uranium 5f electrons: Γnmr(T) ∝ T0.54(4) close to the dependence Γ(T) ∝ T0.5 characteristic of concentrated Kondo systems above the coherent state formation temperature. |
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