Nitroxyl-radical rotational-mobility anisotropy effects in magnetization-transfer electron spin echo

Formulas have been derived for the magnetization transport in the limiting case of uniaxial rotation and any reorientation correlation (Ivanov-Valiev model). Numerical calculations have been performed for particular situations. Rotational-mobility anisotropy makes itself felt when the difference in the angles between the symmetry axis for the nitroxyl radical magnetic tensor and the rotation axis is less than 30° or close to 90°.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 6, pp. 647–653, November–December, 1989.     

Generalized-periodic motions of nonautonomous systems

The definition and existence criterion are given for the generalized-periodic motions of a certain wide class of systems. The class contains all the systems that can be characterized by the classical periodic operator of displacement, the systems generated by the Volterra integral equations, and some others. A relationship is established between generalized-periodic motions and integral invariant sets.     

Investigation of rare-earth manganates and manganites by the µ<Emphasis Type="Italic">SR</Emphasis>-method

The present paper is devoted to studying the multiferroics HoMnO₃, YMnO₃, EuMn₂O₅, and GdMn₂O₅ by means of the µSR-method. Determination of the dynamic relaxation parameter 7n and the distribution of the local magnetic fields results in a clear phase diagram.     

Multiparticle perturbation theory and an accurate calculation of parity nonconservation in cesium

A method of calculating higher-order correlation corrections, using Green's functions and the Feynman diagrammatic technique, is developed. A basis of the single-electron orbitals is computed using the relativistic Hartree-Fock method. The interaction of an atom with an external field is computed by solving the time-dependent Hartree-Fock equations. In the methodology presented, we consider all the second-order correlation corrections and the dominating classes of higher order diagrams: the screening of the Coulomb interaction of electrons, particle-hole interaction and mass operator iterations. The calculation of the energy levels, the intervals of hyperfine structure and the amplitudes of the allowed EI-transitions in C_s shows that the method developed ensures precision at the 0.1–1% level. A calculation of the parity nonconservation of the El-amplitude of the transition 6s–7s in Cs is produced. The result <6s¦D_z¦7s> = –(0.91 ± 0.01)·10^–11 i¦e¦a^B (–Q_W/N) is obtained.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 8, pp. 108–119, August, 1990.     

Thermodynamically controlled self-sorting of hetero-bimetallic metallo-supramolecular macrocycles: what a difference a methylene group makes!

(31)P NMR and tandem MS experiments provide clear evidence for the thermodynamically controlled self-assembly of hetero-bimetallic metallo-supramolecular macrocycles through self-sorting caused by different ancillary ligands.