Conditions Extrêmes et Matériaux : Haute Température et Irradiation

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R.A.Shakhovoy, M.Deschamps, A.Rakhmatullin, V.Sarou-Kanian, P.Florian, C.Bessada, 'Motional narrowing under diffusion of two spin sub-lattices in LiNaSO4', Solid State NMR 71 80-86 (2015) doi:10.1016/j.ssnmr.2015.07.003

An expression for the dipolar correlation function characterizing the fluctuations of the Hamiltonian under uncorrelated diffusion of two spin sub-lattices in a solid has been obtained. A corresponding formula, which could be used for fitting the temperature dependencies of the NMR line width, has been deduced. Elaborated expression has been applied to the NMR line width analysis of LiNaSO4 in the temperature range 295-788 K. In addition, spin-lattice relaxation time of 7Li and 23Na nuclei was measured in the temperature range 530-890 K.