The spin-diffusion effect in the dipolar ordering state

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Abstract

The theory of spin diffusion is extended to the case of nuclear dipolar order in solids containing paramagnetic impurities. We show that at the beginning of the relaxation process the relaxation function of the dipolar order is non-exponential, due to the direct interaction with paramagnetic impurities, and proceeds to become an exponential function of time, when spin diffusion of the dipolar order takes place. Using experimental data on these two relaxation regimes in CaF2 doped with Mn2+, the diffusion coefficient and the radius of the diffusion barrier were estimated.

Original languageEnglish
Pages (from-to)4045-4052
Number of pages8
JournalJournal of Physics Condensed Matter
Volume11
Issue number20
DOIs
StatePublished - 24 May 1999

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