Abstract
Electron spin–lattice relaxation has been measured for PO32− radical in glycinium phosphite gly·H3PO3 crystal and its deuterated analogue in temperature range 40–300 K. Angular dependence of the relaxation rate was measured in three crystal planes at room temperature. The Debye cut-off temperature has been calculated as ΘD = 97 K, which indicates that the temperature dependence of 1/T1 is governed by radical local vibrations localized in optical phonon modes range. Theories of possible 1/T1 angular dependence are reviewed. The anisotropy of spin–lattice relaxation rate in our crystal is assumed to be a result of local magnetic field fluctuations due to electron–proton dipolar coupling. Theoretical evaluation of 1/T1 were performed for coupling with protons at distances up to 0.46 nm. Not perfect agreement was found with motion correlation time τc = 2·10−9 s.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call