The goal of this research was to look at the regular and irregular dynamics of spin-triplet states (STSs) in one-photon and one-magnon interactions with a changing magnetic field and a lattice, respectively. Analytically, the anisotropic regular dynamics of molecular single crystal STSs in zero constant and weak changing magnetic fields (weakness indicates the lack of saturation at the steady state and of nutation at the pulse EPR) directed along the molecular axes were examined. The equations characterising the sample magnetization's linear oscillations along that molecular axis, along which its nonzero starting value was produced, were constructed. The steady-state dynamical susceptibility to variable fields tensor was discovered. The effect of a short MW pulse on STS has been mathematically characterised, with a periodic dependence on the pulse duration and detuning. Without using the high temperature approximation over the phonon temperature, the anisotropic irregular dynamics of electron spin-lattice relaxation (SLR) at its one-phonon mechanism were explored, and the SLR rates of the individual STS transitions were computed. The related SLR probabilities were expressed in the form, which assumes a lattice's fractal dimensionality d; the results with d=4/3 corresponded well with the experimental data in STS of ribonuclease T1's buried tryptophan.
Author (S) Details
N. P. Fokina
Institute 'Talgha', Georgian Technical University, 0175 Tbilisi, Georgia.
M. O. Elizbarashvili
Vladimir Chavchanidze Institute of Cybernetics, Georgian Technical University, 0186 Tbilisi, Georgia.
View Book :- https://stm.bookpi.org/NUPSR-V15/article/view/3485
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